统计与概率
数据分析、概率分布、假设检验与统计方法。
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the histogram shows the weights, in pounds, of checked luggage on a fli…
The mean is most likely about 28 pounds.
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a set of test scores is normally distributed with a mean of 75 and a st…
The z - score for 85 is calculated as $z = 1$. The area to the right of $z = 1$ under the normal curve is approximately 15.73%. So, the probability that a randomly selected score …
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question 1 (3 points) a machine is designed to fill cereal boxes with 3…
There is not enough evidence to conclude that the machine is operating improperly ### Question 2
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shopping times (in minutes) 22 30 38 27 28 34 30 19 32 15 24 31 33 26 1…
| Shopping times (in minutes) | Frequency | |--|--| | 15 to 20 | 4 | | 21 to 26 | 4 | | 27 to 32 | 6 | | 33 to 38 | 2 | To construct the histogram: - For the interval 15 - 20, dra…
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suppose that $chi^{2}$ follows a chi - square distribution with 24 degr…
(a) \(0.820\) (b) \(36.42\)
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the following passage is set during the american civil war. select the …
The evidence "he chafed under the inglorious restraint, longing for the release of his energies, the opportunity for distinction" best supports the statement.
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in the following passage, author joan didion describes her female ances…
"They tended to accommodate any means in pursuit of an uncertain end. They tended to avoid dwelling on just what that end might imply."; "The past could be jettisoned, children bu…
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why does that rift valley in africa get called the \cradle of humanity\…
The oldest fossils of the earliest humans were found there, meaning it's the place where Humanity originated
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read we outgrow love like other things by emily dickinson. we outgrow l…
The word "antique" suggests love is outdated, which creates a tone of disappointment.
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on their website, a property - management company states that the mean …
(a) $H_0:\mu = 725$, $H_1:\mu<725$ (b) One - tailed t - test (c) t - test statistic (formula: $t=\frac{\bar{x}-\mu_0}{s/\sqrt{n}}$) (d) Need sample mean $\bar{x}$, sample standard…
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what is the denotation of a word? its literal meaning its implied meani…
A. its literal meaning
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understanding contextual meanings read the following sentences. if the …
1. He has a utilitarian approach to furniture - it must be functional. 2. C 3. She interposed herself between the two arguing parties. 4. C 5. C 6. He comported himself with digni…
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each (x, y) pair above represents an excellent basketball players heigh…
Let's assume after using a regression calculator, the linear regression equation is \(y\approx0.37x + 1.9\) (values may vary depending on the calculator's precision). So the blank…
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5. there are many charities starting up to help families effected by th…
5. cataclysmic 6. catalyze 7. category 8. catalyst 10. catatonic
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4. yes, a comet slamming into the planet or some galactic could wipe us…
4. cataclysm 6. catapulted 8. catalyst 10. catatonic
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according to a report done by s & j power, the mean lifetime of the lig…
(a) $H_0:\mu = 55$, $H_1:\mu eq55$ (b) Two - tailed test (c) Assume $z = 2$ (example value based on assumed data above) (d) $p - value = 0.0456$ (e) No
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adjectives assignment: put these sentences in spanish using the adjecti…
1) La mujer es bonita. 2) Mi abuela es amable. 3) El hombre es fuerte. 4) El chico es alto y delgado. 5) Las chicas son inteligentes. 6) Mi tía es mala. 7) El anciano es raro. 8) …
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the main, or central, idea of the passage is baseball players and coach…
It cites examples of potential signals.
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1. this catastrophic earthquake nearly leveled all of san francisco. 2.…
1. catastrophic 2. catastrophes 3. category 4. cataclysm 5. 6. 7. category 8. 9.
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according to a report done by s & j power, the mean lifetime of the lig…
(a) The null hypothesis $H_0:\mu = 55$ and the alternative hypothesis for a two - tailed test should be $H_1:\mu eq55$ (the given $H_1:\mu < 55$ is incorrect for a two - tailed t…
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do you speak baseball? if you watch a professional baseball game attent…
Baseball players and coaches use secret signals to communicate strategy to each other.
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1. this earthquake nearly leveled all of san francisco. 2. have occurre…
1. catastrophic 2. catastrophes 3. category 4. catastrophic 5. catastrophic 6. (no perfect match from list) 7. category 8. catalyst
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choose the method that would be best to represent the information. scat…
- Scatterplot: To plot the heights and weights of a group of people; To plot how many students bought lunch at school each month of the school year and whether there was a correla…
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the means and mean absolute deviations of the individual times of membe…
0.09
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elias likes to read during his summer breaks. the table below shows the…
The modes differ by 40 and the ranges differ by 40.
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polinas math scores are shown in the table. polinas math scores math sc…
8.8
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language considered offensive in modern society should be removed from …
Classic works of literature should retain their original language, offensive or not, because an author's choice of words is important to the meaning and historical context of the …
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the heights, in feet, of the trees for sale at two nurseries are shown …
The mean of the tree heights at Yard Works is less than the mean of the tree heights at The Grow Station. The range of the tree heights at Yard Works is greater than the range of …
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joaquin and trisha are playing a game in which the lower median wins th…
A. Joaquin won because the median of his scores is 73.5 and the median of Trisha's scores is 83.
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last weeks and this weeks daily high temperatures are shown in the tabl…
5 degrees
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georgina likes to read during her summer break. the table below shows t…
The number of pages in each book varied more last summer than this summer.
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last weeks and this weeks low temperatures are shown in the table below…
- the mean of this week's temperatures - the mean of last week's temperatures - the range of this week's temperatures
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the means and mean absolute deviations of the individual times of membe…
The difference between the mean times is about 2 times the mean absolute deviation of the data sets.
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the means and mean absolute deviations of the amount of rain that fell …
8%
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finding the ratio of the difference in means to the mad what is the app…
6
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robin’s scores: 99, 108, 102, 107, 119 mean = 107; mad = 5.2 evelyn’s s…
The mean absolute deviation (MAD) is a measure of the average distance between each data value and the mean of a data - set. For Robin, on average, each score is 5.2 points away f…
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finding the mean absolute deviation evelyns scores 125 137 138 145 145 …
5.6
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finding distances from the mean the mean of evelyns scores was 138. com…
$x = 13$ $y = 1$ $z = 7$
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finding the mean absolute deviation robins scores 99 108 102 107 119 di…
$5.2$
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the mean of robins scores was 107. complete the chart to find the absol…
$x = 5$ $y = 0$ $z = 12$
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change subtraction into a +/- -2 negative signs means it has changed to…
63) \(-2\) 64) \(9\) 65) \(3\) 67) \(-7\) 68) \(1\) 69) \(1\) 70) \(-10\) 71) \(-3\) 72) \(-3\) 73) \(-9\) 74) \(0\)
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change subtraction into a +/- -2 negative signs means it has changed to…
63) -2 64) 9 65) 3 67) -7 68) 1 69) 1 70) -10 71) -3 72) -3 73) -9 74) 0
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class midpoints, x|frequence, f|xf 170.5|3 172.5|2 174.5|5 176.5|6 178.…
$176.9$
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comparing the medians of two data sets robins scores: 99, 108, 102, 107…
Robin's median is 107 and Evelyn's median is 138. The medians do not support the conclusion that Robin is winning the game as Evelyn's median score is higher.
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fill in the blank 2 points classify the following statement as an examp…
This is an example of empirical probability, since it is based on data from a survey.
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comparing the means of two data sets robin and evelyn are playing a tar…
Robin is winning the game because Robin's mean score (107) is lower than Evelyn's mean score (138), and in this game, a lower number of centimeters away from the center indicates …
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2 fill in the blank 2 points classify the following statement as an exa…
Classical probability, since all combinations of 6 - number selections from 1 to 44 are equally likely.
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robin and evelyn are playing a target game. the object of the game is t…
138
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fill in the blank 2 points classify the following statement as an examp…
empirical; the probability is based on company records (observed data)
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learning target 2: i can identify and define variables. complete all le…
a. The independent variable is the number of people in a group. We know this because we can change the size of the group (e.g., have groups with different numbers of participants)…
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comparing statistical measures the difference between noahs mean and ga…
The difference between Noah's mean and Gabriel's mean is $0.17$. The ratio of the difference in the mean to Noah's MAD is $\frac{0.17}{2.67}$. The ratio of the difference in the m…
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emmetts diner tracks its soft drink sales. soda orders month iced teas …
The double - line graph should have points marked and lines drawn according to the data in the table for Iced teas and Ginger ales for each month (April - September). Since this i…
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“i wandered lonely as a cloud” by william wordsworth i wandered lonely …
sharing that he didn't realize at the time what the scene would come to mean to him
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unit 2: exploring two variable data hw 1 - two categorical variables th…
a) Side - by - side bar chart is created as described above. b) Segmented bar graph is created as described above. c) Agree, there is an association between a person's sex and the…
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language, style, and tone unit test \i wandered lonely as a cloud\ by w…
A "host of golden daffodils" evokes the biblical allusion of a "heavenly host" of angels.
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great granola makes a trail mix consisting of peanuts, cashews, raisins…
the average amount of cashews per bag to determine average cost the amount of variation in ounces of cashews in the bags of trail mix which factory produces the most consistent ou…
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when we say that families headed by a self - employed person make signi…
B. Mean
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what inferences can you make analyzing the data summary table? check al…
Gabriel has a slightly higher quiz average than Noah. Gabriel has more variation in his quiz scores. Gabriel’s quiz scores are more spread out than Noah’s quiz scores.
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11. which quote was most likely said by john mason? a. “once vigorous m…
B. "Sin and shame ever go together; he that would be freed from the last must be sure to shun the company of the first."
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noah and gabriel have taken 6 quizzes in english class so far. there ar…
2.67
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6. what does ¿cómo eres? mean? *
What are you like?
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literary text evidence quick check what does the word explicit mean? (1…
C. directly stated
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2. what does the verb ser mean? *
In Spanish, it means "to be".
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literary text evidence quick check which answer choice accurately defin…
a conclusion formed from evidence and reasoning
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noah and gabriel are in the same english class. they have taken 6 quizz…
Noah's mean, median, mode: 87, 85.5, 85 Gabriel's mean, median, mode: 87.17, 86, 86
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1. the calculator screen shows the linear regression for the data in th…
C. a strong negative correlation ### Problem 2 Assume the linear regression equation from the calculator is \(y = ax + b\). From the calculator screen (not fully visible in the im…
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the etymology of tête - à - tête relates to a persons head or the hair …
The meanings of tête - à - tête in French and vis - à - vis in Latin were similar in the past. In English today, the meanings of tête - à - tête and vis - à - vis are much differe…
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read the passage from walden i went to the woods because i wished to li…
3. minimalism
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use the sentences to answer the question. the restaurant server set dow…
Bon appétit is a way of telling someone to enjoy their meal.
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1. what type of association is shown by the data in the scatter plot? a…
1. A. positive association 2. D. \(y = 3x - 5\) 3. positive correlation 4. A. The slope is the cost of one book; D. The y - intercept is the cost of Hana's lunch 5. 55
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which of the following is closest to the slope of the line of best fit …
0.36
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jake made these miniature golf scores: 2, 3, 2, 4, 3, 3, 3, 4, 2, 3, 4,…
range: 7 mean: 3.5 median: 3 mode: 4
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find the weighted average. if necessary, round your answer to the neare…
$6.6$
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from the economic report of the president however, experience within th…
3. something that can be purchased
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data is gathered from college students from around the country in order…
The statement is incorrect because the y - axis of a bar graph can represent time (hours in this instance) and is not limited to frequency, count, or percentage.
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people can find fashionable clothes at consignment shops. these stores …
D. Consignment shops are great places to find fashionable designer clothes at one half to one third of new prices.
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during a semester, a sample of college students was asked to keep track…
The interpretation is wrong because the graph represents weekly spending amounts and not spending at specific points in the semester (beginning, middle, end).
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1. what is the basic power and responsibility of the courts? 2. what ty…
1. To interpret and apply the law, resolve disputes, and ensure justice. 2. Statutes, regulations, common - law, and constitutional law. 3. Need to consider precedent, constitutio…
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which statements best describe the dot plot or box plot? check all that…
Add the number of dots above each age in the dot plot to find the number of players on the team: $2 + 1+3 + 2+3 + 2=13$. The median appears clearly on the box plot at the line wit…
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which statement correctly interprets the scatter plot? a. the scatter p…
B. The scatter plot shows a strong negative correlation.
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it is good to keep certain things in mind when getting to the airport. …
D. If you have a friend drive you to the airport, make sure that he or she can also pick you up once you get back.
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mrs. liang, the librarian, wants to compare the numbers of patrons who …
It is not balanced because it is less likely to include teens, young adults, and senior citizens in the patron population.
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ethan and three friends kept track of their average points scored in ea…
Joaquin, because his interquartile range is the lowest
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what is the best definition for \sample\ as used in statistics? the ent…
B. a part of the population that represents the entire population
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which type of graph most readily shows the interquartile range for a da…
B. box plots
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african slavery was typically more brutal and long - lasting because th…
chattel slavery
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which sentence contains a redundant phrase? a redundant phrase may be v…
C. Although we are few as to number, we are confident that we will make a difference
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1. make a scatter plot for the eater egg hunt data. easter egg hunt num…
Ordered Pair 1: (5, 14) Ordered Pair 2: (10, 26) Slope: 2.4 Equation of the line: $y = 2.4x + 2$
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which statements best describe the box plot or histogram? check all tha…
Using the information in the histogram, the total number of students surveyed is $4 + 4 + 6 + 4 + 2 = 20$. Referring to the histogram, the median of the data is $49.5$. The range …
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conditions on british plantations were slightly better which meant that…
keep slaves healthy enough to reproduce so they could enslave their children
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city b city a is likely to have a colder temperatures because the inter…
City A is likely to have temperatures that remain fairly constant year round because it has a compact interquartile range compared to that of City B. City B is likely to have more…
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ic 25 - 26 american literature 1 bright and dark romanticism extracto d…
La sociedad y el gobierno corrompen al individuo.
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dylan wanted to find the average number of hours per day that the stude…
He should poll more students to eliminate the variability caused by a sample size that is too small.
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internet piracy the term \internet piracy\ refers to the use of devious…
D. a main source of income
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which correctly revises this sentence without changing the meaning? i w…
D. Because we had to travel another seventy miles to reach our destination, I wanted to stop and get more gas.
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explaining causes of skewed data explain why a graphical display might …
Skewed graphical displays can be caused by outliers, limited data range, or non - representative sampling. To ensure data isn't skewed, use random and large samples, check for out…
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three runners recorded their times for the 40 - yard dash over the peri…
The fastest runner is Alana, because she had the least mean running time. The most consistent runner is Lorena, because she had the least interquartile range value.
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the dot plots show the ages of players on two soccer teams. which state…
The Eagles have more variability in the ages of their players. The Eagles have more players.
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a phone company report on the number of texts sent each day included th…
A typical 8 - to 12 - year - old texts 60 times per day. A typical 13 - to 17 - year - old texts more often than a typical 8 - to 12 - year - old.
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what is meant by a private, non - profit colleges \discount rate?\ a. t…
D. The difference between a college's published tuition and average tuition paid by its students.