Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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22. the choice of imagery in \the loon, the lake, the snow, the cold\ (…
22. outdoors 23. sophisticated
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in order to use the defining formula for sample standard deviation, it …
| $x$ | $\bar{x}$ | $x - \bar{x}$ | $(x - \bar{x})^2$ | |----|----|----|----| | 1 | 4.4 | -3.4 | 11.56 | | 3 | 4.4 | -1.4 | 1.96 | | 5 | 4.4 | 0.6 | 0.36 | | 6 | 4.4 | 1.6 | 2.56 …
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22. the choice of imagery in \the loon, the lake, the snow, the cold\ (…
22. outdoors 23. sophisticated
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recall the defining formula used to compute the sample standard deviati…
$n = 5$, $\bar{x}=4.4$
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what symbol is used for the standard deviation when it is a sample stat…
Sample statistic: s. Population parameter: $\sigma$.
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when computing the standard deviation, does it matter whether the data …
Yes. The formula for $s$ is divided by $n - 1$, while the formula for $\sigma$ is divided by $N$.
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what is the relationship between the variance and the standard deviatio…
The standard deviation is the square root of the variance.
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given $g(x)=\frac{(3x + 5)}{2}$, which of the following shows that crea…
\(y=\frac{1}{3}(2x - 5)\) (corresponding to the second - option in the multiple - choice list)
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astrid feels overwhelmed when she opens her math textbook. which one of…
C. Take notes as you read and review them daily
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during the 1920s, people would buy stock on margin, which meant that th…
A. bought it on credit
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a bag with 8 marbles has 2 red marbles, 3 yellow marbles, and 3 blue ma…
$\frac{1}{4}$
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a spinner with 12 equally sized slices has 4 red slices, 3 blue slices,…
$\frac{2}{3}$
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meeting the spending targets in this budget meant some very difficult c…
deciding what would be funded and what would be cut
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a spinner with 10 equally sized slices has 10 yellow slices. the dial i…
$\frac{1}{1}$
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a bag with 8 marbles has 4 red marbles, 3 yellow marbles, and 1 blue ma…
$\frac{1}{2}$
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a major theme of f. scott fitzgeralds work was the idea that the postwa…
D. was empty and meaningless.
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¿cuál es la probabilidad de supervivencia de un car norte de california…
D. 546/600
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10. what percentage of college students have placed a bet on a sporting…
C. Jane because she is taking a smaller sample.
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9. to determine how satisfied patients are with the services they have …
A. a nonsampling error because some patients refused to cooperate by completing the survey.
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when a random sample of first - year college students is surveyed, 38% …
E. The population percentage is very likely to be within 2.8% of the sample percentage.
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7. the alumni association of milpitas high school reports that in a sur…
parameter
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6. six researchers each survey a random sample of 100 customers at a lo…
B. large bias and small variability.
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5. a survey is administered to a random sample of 320 college students,…
A. 4.7%
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when estimating the percentage of college students who apply to graduat…
B. The natural differences that we’d expect to arise from sample to sample.
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a random sample of middle school students is surveyed about their texti…
D. statistic because it summarizes results from individuals included in a sample.
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1. to estimate average wingspan of a certain species of bird, wildlife …
E. None of the above statements are correct.
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determine the shape of the distribution of the data based on the boxplo…
Symmetric
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for the data shown above, find the following. do not round any of your …
$394.625$
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a) find the 5 - number summary: {48, 67.5, 128.5, 198.5, 322} b) comput…
a) Minimum: 48, $Q_1$: 67.5, Median: 128.5, $Q_3$: 198.5, Maximum: 322 b) 130.75 c) - 128.625 d) (No answer provided as box - plots are not fully described in text to choose from)
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the lengths (in kilometers) of a random sample of 20 rivers on the sout…
a) 48, 67.5, 128.5, 198.25, 322 b) 130.75 c) - 128.625
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which of the following statements are true about the boxplot shown here…
D. I and II
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based on the boxplot above, identify the 5 - number summary. minimum: 1…
Minimum: 10 Q1: 12 Median: 15 Q3: 18 Maximum: 20
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based on the boxplot above, identify the 5 - number summary. minimum: q…
Minimum: 10 $Q_1$: 13 Median: 15 $Q_3$: 17 Maximum: 20
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the five number summary of a data set was found to be: 45, 48, 54, 64, …
16
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section 3.3 homework due sep 8 by 11:59pm points 9 submitting an exter …
$4.4$
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find the five - number summary for the data below: 11 3 8 18 1 9 11 8 9…
Minimum: $0$ Quartile 1: $5$ Median: $9$ Quartile 3: $16$ Maximum: $20$
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the following table summarizes the ages of a sample of 49 ad club. use …
$29.55$
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suppose your child is in the eighty - fourth percentile in height and f…
Your child is taller than 84% and heavier than 40% of children their age. Your child is tall and thin, compared to other children their age.
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question 6 the following table summarizes the ages of a sample of 49 ad…
$29.55$
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suppose your child is in the eighty - fourth percentile in height and f…
Your child is taller than 84% and heavier than 40% of children their age.
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section 3.3 homework score: 4/8 answered: 4/8 question 5 approximate th…
$37.1$
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a random sample of 53 students was selected, and they were asked the nu…
The mean, \(\bar{x}\), is \(8.0000\) The sample standard deviation, \(s\), is \(2.9417\)
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section 3.3 homework score: 2/8 answered: 2/8 question 3 here is a freq…
$13.0$
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in a students english class, the final grade is based on six categories…
$75.85$
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you work for a large farm with many fields of corn. you are investigati…
a) $471.9$ b) $654.5$ c) $182.6$ d) Lower: $198$, Upper: $928.4$, Are there any outliers by the 1.5 IQR rule? no
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find the quartiles for the following set of data. data 3 7 7 11 13 14 1…
$Q_1 = 7$ $Q_2 = 13.5$ $Q_3 = 19.5$
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score on last try: 0 of 1 pts. see details for more. at least one score…
$s\approx13.4473$, $\bar{x}=37.6$, at least $88.2400\%$
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find the following measures for the data below: 9 6 19 13 4 19 7 20 11 …
Sorted Data: 0,1,2,4,6,6,7,7,7,9,10,11,12,12,13,15,16,18,19,19,19,20,20 Quartile 1: 6 Median: 11 Quartile 3: 18 Interquartile Range: 12
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q1 = 190 median = 246 q3 = 327 max = 426 1. about percent of the chicks…
1. 75 2. 50 3. 25 4. 50
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a random sample of 10 temperatures in degrees fahrenheit (f) were drawn…
$s\approx14.0277$ $\bar{x}=37.21$ $87.2000\%$
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3. the data set represents the number of pages in the last book read by…
A histogram with appropriate class intervals on x - axis and frequencies on y - axis, with bars of heights as calculated above.
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complete the following statements. the first quartile (q1) corresponds …
The first quartile (Q1) corresponds to the 25th percentile. The median corresponds to the 50th percentile. The third quartile (Q3) corresponds to the 75th percentile.
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suppose you take a standardized test and you are in the 14th percentile…
14% of the scores were your score or lower It depends on how the rest of the class scored. If scores were really low on this exam, it is possible that I got a passing score
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the scores on a standardized test are normally distributed with a mean …
76
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adult men have heights with a mean of 69.0 inches and a standard deviat…
$63.7000$
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suppose baby kittens weights have a mean of 11.4 and a standard deviati…
a. $8.95$ b. $13.80$
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a) if you have scores and you dont know the shape of their distribution…
a) 0.87 b) 1.3
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lives of the noble grecians and romans by plutarch (excerpt) casca gave…
A. Plutarch's work inspired Shakespeare's play
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the acme company manufactures widgets. the distribution of widget weigh…
a) 27, 67 b) 81.5 c) 99.85
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adult men have heights with a mean of 69.0 inches and a standard deviat…
$3.39$
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suppose that the scores on a statewide standardized test have a bell - …
(a) 68% (b) 16% (c) 2.5% (d) 81.5%
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lesson 2 practice problems 1. the dot - plot displays the number of bus…
8
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read the excerpt from act iii of the importance of being earnest. lady …
the belief that engagements and marriages should follow social rules
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the graph illustrates a normal distribution for the prices paid for a p…
1. 0.15 2. 47.5 3. 34 4. 49.85 5. 2.5 6. 68
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question 6 for a 4 - unit class like statistics, students should spend …
a) 9 hours and 15 hours b) 6 hours and 18 hours c) 3 hours and 21 hours
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x 1.3 6.5 5.5 5.6 18.8 10 25.8 standard deviation, s: round to two deci…
Standard deviation, \(s: 8.69\) Variance, \(s^{2}: 75.5\)
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question 5 using your calculator, find the standard deviation and varia…
Standard deviation, \(s\): 8.34 Variance, \(s^{2}\): 69.6
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section 3.2 homework score: 3.42/11 answered: 3/11 question 4 score on …
Range = 85 Standard Deviation \(\approx21.64\)
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section 3.2 homework score: 2.92/11 answered: 2/11 question 4 using you…
Range = 85 Standard Deviation $\approx17.13$
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1) calculate the mean. μ = 12.2 2) fill in the table below: fill in the…
$4.40$
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informational texts contain body paragraphs after the introduction para…
Question 1: A. Supporting details such as statistics, quotes, or charts Question 2: A. a valid and reliable source
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8 16 17 6 14 1) calculate the mean. μ = 2) fill in the table below: fil…
1. $\mu = 12.2$ 2. |$x$|$x-\mu$|$(x - \mu)^2$| |---|---|---| |8|-4.2|17.64| |16|3.8|14.44| |17|4.8|23.04| |6|-6.2|38.44| |14|1.8|3.24| | |$\sum(x - \mu)^2=96.8$| | 3. $\sigma = 4.…
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we are going to calculate the standard deviation for the following set …
1. $\bar{x}=9.2$ 2. |$x$|$x-\bar{x}$|$(x - \bar{x})^2$| |---|---|---| |9|-0.2|0.04| |12|2.8|7.84| |1|-8.2|67.24| |10|0.8|0.64| |14|4.8|23.04| | |$\sum(x - \bar{x})^2 = 98.8$| | 3.…
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section 3.2 homework score: 0/11 answered: 0/11 question 1 find the ran…
88
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1. the list below represents the number of text messages sent on a sing…
A. mean = median ### Question 2
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bowl winner scores the data show the scores of the winning teams of a c…
31
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bowl winner scores the data show the scores of the winning teams of a c…
31
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bowl winner scores the data show the scores of the winning teams of a c…
34
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driving test what does this road sign mean? hazards on yield ahead stop…
B. Yield Ahead
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use the data set listed and technology to create frequency histograms w…
No answer can be provided for the "Choose the correct graph below" part as no graphs are given. The steps to create a 20 - class histogram are shown above.
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use the data set listed and technology to create frequency histograms w…
A. The graph with 10 classes displays the data best. In general, 5 classes are not enough to show a distribution for a set of data and 20 classes gives too much detail.
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solve the equation 6.4g + 6 = 4.4g + 18. a. find the value of g. b. exp…
a. $g = 6$ b. D. Substitute the value for g on both sides of the equation to check the answer. If the check does not work, either the answer is incorrect or there were errors made…
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solve the equation 6.4g + 6 = 4.4g + 18. a. find the value of g. b. exp…
a. $g = 6$ b. To check the value of g, substitute it into the original equation. Calculate the left - hand side and the right - hand side of the equation. If they are equal, the v…
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read this example of incorrect sentence structure. heavy, black clouds …
Heavy, black clouds rushing in from the horizon mean a storm is coming.
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read the sentence. on days when i go jogging in the morning, my mind se…
It creates a compound - complex sentence.
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comparing test scores for the statistics test scores in exercise 37, th…
The z - score for the statistics test is $z_{1}=\frac{x_{1}-63}{7.0}$ and the z - score for the biology test is $z_{2}=\frac{x_{2}-23}{3.9}$, where $x_{1}$ is the student's statis…
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building compound-complex sentences to add meaning have you ever though…
Learning a language can be difficult, yet it is one of the most useful hobbies that I've tried.
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constructing compound sentences to add meaning each pair of sentences c…
1. Refinishing furniture is a creative hobby, but not everyone loves to scour garage sales to find old items. 2. Going to flea markets can help you to notice unique qualities in u…
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graphical analysis #37 - 38. the midpoints a, b, and c are marked on th…
Exercise 37: $z = 0$ corresponds to B, $z = 2.14$ corresponds to C (unusual), $z=-1.43$ corresponds to A. Exercise 38: $z = 0.77$ corresponds to B, $z = 1.54$ corresponds to C, $z…
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constructing compound sentences to add meaning each pair of sentences c…
1. but 2. semicolon 3. but 4. but
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read the sentence. in what ways does the underlined clause add variety …
It adds detail about the photographs. It tells the reader which photographs are being discussed.
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use the data set listed and technology to create frequency histograms w…
No graph can be chosen as no graphs are provided. For best display of data in general, 10 - class histogram is often better.
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use the data set listed and technology to create frequency histograms w…
The histogram with 10 classes likely displays the data best as it provides a good balance between showing the overall distribution and the details within the data.
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taxes the data for a recent year show the taxes (in millions of dollars…
First quartile $Q_1$ is $11.5$, third quartile $Q_3$ is $35.25$, and $IQR$ is $23.75$.
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taxes the data for a recent year show the taxes (in millions of dollars…
First quartile $Q_1$ is $13.5$, Third quartile $Q_3$ is $36.5$, IQR is $23$
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a survey was given to 87 students at a local high school, asking how ma…
A frequency histogram with x - axis labeled "Minutes to Commute" having intervals 0 - 19, 20 - 39, 40 - 59, 60 - 79 and y - axis labeled "Frequency (Number of Students)" with scal…
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22. what is meant by \action plan\ in goal setting? a. a vision stateme…
C. A detailed outline of steps to achieve a goal
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the box - and - whisker plot below represents some data set. what perce…
75%
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use the data set listed and technology to create frequency histograms w…
The steps to create a 10 - class histogram are shown above. Without the given graphs A and B, we cannot choose the correct graph.
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the box - and - whisker plot below represents some data set. what is th…
80