統計と確率
データ分析、確率分布、仮説検定、統計手法。
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1 true or false 10 points current reading theory demonstrates that mean…
1. True 2. Writing your thoughts while you read in the margins
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for a 4 - units class like statistics, students should spend average of…
a) 9 hours and 15 hours b) 6 hours and 18 hours c) 3 hours and 21 hours
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what is the meaning of the word arid as used in the passage? the arabia…
having little or no moisture
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what is the meaning of the word consolation as used in the passage? aft…
relief from sadness or suffering
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scores on the sat test have a mean of 1475 and a standard deviation of …
Jamie's z - score on SAT is $-2.49$ and Jamie's z - score on ACT is $-2.55$. Since Jamie's z - score on SAT is greater than z - score on ACT, we conclude that the SAT score is rel…
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jayden scored 67 in the class with the mean 72.4 and the standard devia…
Jayden's z - score is $-0.92$ and Chance's z - score is $-0.80$. Since Jayden's z - score is less than Chance's z - score, we conclude that Chance scored relatively better.
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on a recent quiz, a class mean was 72 with a standard deviation of 8.2.…
z - score: 2.20 Would getting a score of 90 be considered unusual/significant? Unusual/Significant
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on a recent quiz, the class mean was 74 with a standard deviation of 3.…
z - score: - 0.94 Not Unusual/Not Significant
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2. -/1 points why does the vertical line test tell us whether the graph…
When a vertical line intersects the graph of a relation more than once, it indicates that for that input there is more than one output, which means the relation is not a function.
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on a recent test, the class mean was 8.1 with a standard deviation of 1…
z - score: 1.36 Not Unusual/Not Significant
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the results of a common standardized test used in psychology research i…
$2.2$
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the amount of snowfall is a function of the elevation. complete parts a…
There were 4 inches of snowfall at an elevation of 2000 feet.
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a) at a particular gas station, the cost of a gallon of gas, in dollars…
a) B. f(87) is the cost, in dollars, of one gallon of 87 - octane gasoline. b) s(25) is the distance, in miles, that John has traveled in 25 minutes.
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question 2, 1.1.2 part 1 of 2 hw score: 5.88%, 1 of 17 points points: 0…
a) B. f(87) is the cost, in dollars, of one gallon of 87 - octane gasoline. b) s(25) is the distance traveled, in miles, in 25 minutes.
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toms electronics offers five models of cell phones (a, b, c, d, and e).…
13
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12 multiple choice 6.67 points from the same scenario as before: a geni…
0.38%
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when tawny is asked to write down her dreams as a class assignment, she…
activation - synthesis hypothesis
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4 multiple choice 6.67 points which is the odd one out? (¿cuál es el im…
D. 68%
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3 tries left calvin had a dream about his dog snoopy in which he consta…
D. manifest content, latent content
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13 multiple choice 6.67 points a standardized test at ohs is given to 1…
B. 522
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from the previous question, the probability that he scores between 80 &…
True
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multiple choice 1 point what does \path dependence\ mean in the context…
The past events and decisions create a self reinforcing trajectory that makes it difficult for political identities to change once they are formed
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iq scores of people around the world are normally distributed, with a m…
The probability that a randomly - selected person would score less than 122 is approximately $0.9292$. Since the closest option to $0.9292$ among the likely options (not shown ful…
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42 multiple choice 1 point what does the \supremacy clause\ in a federa…
The central or federal government law takes precedence over sub - government or state law when there are conflicts
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a basketball - average scoring score is 174, and it is normally distrib…
2.3% (closest to 2.28%, so if we assume the options are approximations, we need to know the options clearly, but based on the calculation the proportion of games with a score more…
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matching 4.67 points match the items with the correct answers (relacion…
Empirical Rule - 68 - 95 - 99.7 What is the Mean? - The average What is the Standard Deviation? - Spread of Data
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40 multiple choice 1 point the \common good vs individualism\ document …
Citizens know that by making small sacrifices for the public good, such as participating in local government, engaging in charitable work, or being honest in business dealings, th…
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7 true or false 6.67 points the amount of standard deviations under the…
False
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3. when we pray for others, including our enemies. when we pray for oth…
3. Intercessory prayer; Example: Praying for a sick friend to get well. 4. Thanksgiving prayer; Example: Thanking God for a good - grade on a test. 5. Adoration prayer; Example: S…
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if asked to find an area to the right of the curve what must be done? (…
1 - z - score area
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from the previous question; find the percent of heights between 125 cm …
C..2790
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2 multiple choice 6.67 points the heights of all 10 - year old children…
B. 84%
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normal distribution exam i used to be addicted to soap, but im clean no…
False
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use a scatter plot to display the data shown in the table available bel…
First part: Without seeing all options clearly (assuming only A and C are shown fully), we need to plot the points (35, 17.16), (37, 15.83), (34, 15.79), (40, 16.71), (34, 16.80),…
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6 from unit 1, lesson 13 a group of pennies made in 2018 are weighed. t…
# Explanation: ## Step1: Calculate the mean of the painting - data The formula for the mean $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $n = 10$ and $x_{i}$ are the data - po…
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heres a question to make sure you got that: what does it mean to square…
A. Multiply the number by itself.
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the table shows population statistics for the ages of best actor and be…
Best Actor: $z\approx2.30$ Best Supporting Actor: $z\approx - 0.29$ The Best Actor was above the mean, which is unusual. The Best Supporting Actor was below the mean, which is usu…
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determine whether the variable is qualitative or quantitative. explain …
The variable is quantitative because heights are numerical measurements.
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use the empirical rule. the mean speed of a sample of vehicles along a …
68
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling is used? B. Convenience sampling is used, because students are chosen due to convenience of location. What potential sources of bias are present, if any? A. …
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determine whether the approximate shape of the distribution in the hist…
D. The shape of the distribution is skewed right because the bars have a tail to the right.
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determine whether the underlined number is a statistic or a parameter. …
Parameter because the value is a numerical measurement describing a characteristic of a population.
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5 multiple choice 1 point how do you properly cite a book source in apa…
5. Smith, J. (2020). The Psychology of Influence. New York: Random House. 6. Plagiarism and a violation of academic integrity policies. 7. False 8. True
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use the frequency histogram to complete the following parts. (a) determ…
(a) 7 (b) 50, 250 (c) 5 (d) C. About half of the employees' salaries are between $40,000$ and $49,000$
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determine whether the approximate shape of the distribution in the hist…
D. The shape of the distribution is skewed right because the bars have a tail to the right.
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determine whether the underlined number describes a population paramete…
C. The number is a sample statistic because it describes the people in a sample, which is a subset of all of the people in the country
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you are applying for a job at two companies. company a offers starting …
B. Company B, because data values that lie within one standard deviation from the mean are not considered unusual
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multiple choice 2 points solve the linear equation. -24 - 3x = 3 no sol…
$x = - 9$ ### Question 26
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identify the explanatory variable and the response variable. a farmer w…
The explanatory variable is the type of fertilizer. The response variable is the harvest of the crop.
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a survey of 1021 u.s. adults found that 45.1% have a favorable view of …
1. D. The responses of all U.S. adults 2. A. The 1021 U.S. adults selected 3. A. 45.1% of the 1021 U.S. adults who have a favorable view of Cuba and 54.9% of the 1021 U.S. adults …
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isis means of funding for terrorism operations consist of ________; whe…
ISIS: oil - smuggling, extortion, looting; Taliban: drug - trafficking, extortion, donations
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling was used? C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1400 phone numbers had an equal chance…
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match each description to its meaning. match term definition la luge a)…
La luge - D Le ski alpin - C Black diamond - B Skeleton sled - A
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1 multiple choice 2 points which system of justice is practiced in the …
1. B. the adversarial system 2. A. True 3. B. False 4. A. Crime Control Model
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in a recent survey, 8 people were each asked the number of times they h…
17
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data were collected from libraries about the number of patrons who have…
A patron who has been using the library for 13 years is predicted to have less than 1 overdue book.
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18 numeric 10 points the z - score of a basketball player is in the 29 …
- 0.55
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the running times for the 100 are posted by the ohs track team is norma…
$-2.375$
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15 multiple choice 10 points a grocery store received three shipments o…
The shipments from all three farms are all likely to have an approximately equal number of bags that weigh less than 19 oz.
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14 multiple choice 10 points mohammed annoys mr. r on a regular day bas…
0.00065% (closest to 0.0006% among the options)
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desi plays basketball for ohs and the coach measures desi by his shoe t…
5; 2 Categorical & 3 Quantitative (Shoe type, Shooting Form, PPG, SPG, APG)
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13 multiple choice 10 points desi plays basketball for ohs and the coac…
5; 2 Categorical & 3 Quantitative (Shoe type, Shooting Form, PPG, SPG, APG)
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question 20 (1 point) (01.03 mc) lee la frase en negrita y escoge la pa…
B. Logros
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12 multiple choice 10 points when comparing the distribution of favorit…
Pie Chart
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11 multiple choice 10 points when interpreting boxplots from two sample…
B. Since both samples display distinct characteristics relating spread, it is important to balance insights gathered from IQR and outlier analysis rather than favor one over anoth…
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question 21 (1 point) (01.03 lc) lee la frase en negrita y escoge la pa…
c. La comprensión
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10 multiple choice 10 points the iqr of a box plot has 3 quartiles. q1 …
C. 25%
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jeanfrank works as a server in a small restaurant, where he can earn a …
The higher value of tips for Jeanfrank aren't automatically considered an anomaly, however, they are just less common in this workday; There is a positive skew for Jeanfrank's tip…
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multiple answer 10 points. the running times for the 100 are posted by …
The player's time is in the 3 SD to the left, The player's time is an anomaly
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multiple answer 10 points. the running times for the 100 are posted by …
The player's time is in the 3 SD to the left The player's time is an anomaly
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the running times for the 100 are posted by the ohs track team is appro…
The player's time is in the 3 SD to the left.
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5 multiple choice 10 points the distribution of long - jump distance in…
Satchel's distance was at the 30th percentile of the distribution and was less than Brooke's distance.
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if the scores on a standardized test are normally distributed with a me…
Approximately 68%
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3 multiple answer 10 points select all that apply to right skewed distr…
C. Positive Skew D. The Mean is greater than the Median
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2 multiple - choice 10 points which of the following best explains why …
The data may be too sparse, leading to an unreliable visualization that does not reflect the true spread and shape of the data set.
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which of the following best explains why a histogram with several gaps …
The data may be too sparse, leading to an unreliable visualization that does not reflect the true spread and shape of the data set.
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which of the following best explains why a histogram with unequal bin o…
The bins are too wide, which might over - smooth variability in the data and obscure important features.
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1 multiple choice 10 points when comparing sat scores that are normally…
To compare individual scores in relation to their group's average performance while accounting for variability within each group.
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a group of 126 doctors and nurses volunteered to run a health fair. eac…
(a) \(0.67\) (b) \(0.36\)
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martina is training for a cycling race. she recorded the distance (in k…
(a) 40 (b) The same number of rides had a distance under 28 as had a distance over 28. (c) 38 to 50
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martina is training for a cycling race. she recorded the distance (in k…
(a) 35 (b) The same number of rides had a distance under 28 as had a distance over 28. (c) 38 to 50
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data analysis and probability interpreting a box - and - whisker plot: …
(a) The number of plants sold was above 60 on more days than it was below 60. (b) 60 to 64 (c) 12
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4. in a statistics class of 40 students, the final grades were given as…
(a) The data is ordinal. (b) | Grade | Frequency | | ---- | ---- | | A | 7 | | A- | 5 | | B | 6 | | B+ | 9 | | B- | 3 | | C+ | 2 | | D | 4 | | F | 4 |
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the word decagon contains the root dec. what does the root dec mean? on…
ten
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3. twenty - five army inductees were given a blood test to obtain their…
| Blood Type | Frequency | |----|----| | A | 7 | | B | 8 | | AB | 4 | | O | 6 | This is nominal data.
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select the word that means a refusal to buy or use something in order t…
Boycott
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4. identifying themes what role did religious freedom play in the found…
4. Religious freedom was a key factor in Rhode Island's founding, attracting those seeking to practice their faith without persecution. 5. Resolved through treaties, land - relate…
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the word automobile contains the root auto. what does the root auto mea…
own or self
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2. a mathematics professor decides to select a sample of 5 students fro…
a) The population size is 50. The ratio of population size to sample size is $\frac{50}{5}=10$. b) Since it is systematic sampling and the first - selected student number is 8, an…
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1. a mathematics teacher marked a set of 30 exam papers. the grades are…
(b) 10
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this sign means: another road crosses yours another lane is merging wit…
Another road crosses yours
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question 6 0.2 pts research into the personal and cognitive characteris…
A. Diffusion
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a) state the random variables. rv x = the length of metacarpal of a ran…
b) The symbol is $r$ and the value is $0.628$. There is a strong positive linear relation between length of metacarpal and height for sets of skeletal remains. c) The symbol is $R…
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the probability of event a is 0.48, the probability of event a and b is…
D. 0.62
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every person has blood type o, a, b, or ab. a random group of people ar…
The probability that a randomly chosen person from this group has type B is $\frac{3}{25}$. The probability that a randomly chosen person from this group has type AB is $\frac{1}{…
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josiah takes a multiple - choice quiz that has three questions. each qu…
$\frac{1}{125}$
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this week in school, there is a 75 percent probability of having a fire…
A. No, because $P(F\cap T) eq P(F)\cdot P(T)$
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the names of the months are each written on a slip of paper. if a slip …
ends with an r and has five or fewer letters
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a pharmaceutical company collects data on the side effects participants…
5 percent
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which events are independent? check all that apply. each number 1 throu…
A number cube is rolled and a spinner is spun. Henry rolls a multiple of 2 and lands on a red portion of the spinner; Two cards are randomly chosen from a standard deck. Eliza cho…