Question 1

All class intervals in a histogram have the same width.

Accepted Answer

A) True 
 B)False

Question 2

The mean $\bar { x }$ of a data set is 36.71, and the sample standard deviation s is 3.22. Find the interval representing measurements within one standard deviation of the mean.

Accepted Answer

A)  (33.49,39.93) 
B)  (27.05,46.37) 
C)  (30.27,43.15) 
D)  (35.71,37.71) 
A)  (33.49,39.93) 
B)  (27.05,46.37) 
C)  (30.27,43.15) 
D)  (35.71,37.71)

Question 3

Which of the following is a measure of relative standing?

Accepted Answer

A) pie chart 
B) variance 
C) mean 
D) z-score 
A) pie chart 
B) variance 
C) mean 
D) z-score

Question 4

The bars in a histogram should be arranged by height in descending order from left to right.

Accepted Answer

A) True 
 B)False

Question 5

The process for finding a percentile is similar to the process for finding the median.

Accepted Answer

A) True 
 B)False

Question 6

A shoe company reports the mode for the shoe sizes of menʹs shoes is 12. Interpret this result.

Accepted Answer

A) Half of the shoes sold to men are larger than a size 12 
B) Most men have shoe sizes between 11 and 13. 
C) Half of all menʹs shoe sizes are size 12 
D) The most frequently occurring shoe size for men is size 12 
A) Half of the shoes sold to men are larger than a size 12 
B) Most men have shoe sizes between 11 and 13. 
C) Half of all menʹs shoe sizes are size 12 
D) The most frequently occurring shoe size for men is size 12

Question 7

The pie chart shows the classifications of students in a statistics class. What percentage of the class consists of freshman, sophomores, and juniors?

Accepted Answer

A) 54% 
B) 44% 
C) 86% 
D) 14% 
A) 54% 
B) 44% 
C) 86% 
D) 14%

Question 8

An outlier in a data set may have a simple explanation such as a scale was not working properly or
the researcher inverted the digits of a number when recording a measurement.

Accepted Answer

A) True 
 B)False

Question 9

Chebyshevʹs rule applies to qualitative data sets, while the empirical rule applies to quantitative
data sets.

Accepted Answer

A) True 
 B)False

Question 10

Which of the graphical techniques below can be used to summarize qualitative data?

Accepted Answer

A) dot plot 
B) stem-and-leaf plot 
C) box plot 
D) bar graph 
A) dot plot 
B) stem-and-leaf plot 
C) box plot 
D) bar graph

Question 11

A sample of 100 e-mail users were asked whether their primary e-mail account was a free
account, an institutional (school or work)account, or an account that they pay for
personally. Identify the classes for the resulting data.

Accepted Answer

free account, instit

Question 12

A study was designed to investigate the effects of two variables - (1)a studentʹs level of mathematical anxiety and (2)teaching method - on a studentʹs achievement in a mathematics
Course. Students who had a low level of mathematical anxiety were taught using the traditional
Expository method. These students obtained a mean score of 480 with a standard deviation of 30
On a standardized test. Assuming a mound-shaped and symmetric distribution, in what range
Would approximately 68% of the students score?

Accepted Answer

A) between 450 and 510 
B) above 510 
C) below 510 
D) below 450 and above 510 
A) between 450 and 510 
B) above 510 
C) below 510 
D) below 450 and above 510

Question 13

Chebyshevʹs rule applies to large data sets, while the empirical rule applies to small data sets.

Accepted Answer

A) True 
 B)False

Question 14

Suppose that 50 and 75 are two elements of a population data set and their z-scores are -3
and 2, respectively. Find the mean and standard deviation.

Accepted Answer

mean: 65;

Question 15

Explain how it can be misleading to draw the bars in a histogram so that the width of each
bar is proportional to its height rather than have all bars the same width.

Accepted Answer

The reader may think that the

Question 16

In practice, the population mean $\mu$ is used to estimate the sample mean $\bar { x }$

Accepted Answer

A) True 
 B)False

Question 17

An outlier is defined as any observation that falls within the outer fences of a box plot.

Accepted Answer

A) True 
 B)False

Question 18

The total points scored by a basketball team for each game during its last season have been summarized in the table below. Which statement following the table must be true? $$\begin{array} { | c | c | } 
\hline \text { Score } & \text { Frequency } \
\hline 41 - 60 & 3 \
\hline 61 - 80 & 8 \
\hline 81 - 100 & 12 \
\hline 101 - 120 & 7 \
\hline
\end{array}$$

Accepted Answer

A) The range is at least 41 but at most 120. 
B) The range is at least 81 but at most 100. 
C) The range is 79. 
D) The range is at least 41 but at most 79. 
A) The range is at least 41 but at most 120. 
B) The range is at least 81 but at most 100. 
C) The range is 79. 
D) The range is at least 41 but at most 79.

Question 19

For a given data set, which is typically greater, the range or the standard deviation?

Accepted Answer

The answer of For a given data set, which is...

Question 20

Many firms use on-the-job training to teach their employees computer programming. Suppose you work in the personnel department of a firm that just finished training a group of its employees
To program, and you have been requested to review the performance of one of the trainees on the
Final test that was given to all trainees. The mean and standard deviation of the test scores are 70
And 3, respectively, and the distribution of scores is mound-shaped and symmetric. Suppose the
Trainee in question received a score of 60. Compute the traineeʹs z-score.

Accepted Answer

A) z = 0.81 
B) z = -30 
C) z = -10 
D) z = -3.33 
A) z = 0.81 
B) z = -30 
C) z = -10 
D) z = -3.33

All class intervals in a histogram have the same width.

The mean $\bar { x }$ of a data set is 36.71, and the sample standard deviation s is 3.22. Find the interval representing measurements within one standard deviation of the mean.

Which of the following is a measure of relative standing?

The bars in a histogram should be arranged by height in descending order from left to right.

The process for finding a percentile is similar to the process for finding the median.

A shoe company reports the mode for the shoe sizes of menʹs shoes is 12. Interpret this result.

The pie chart shows the classifications of students in a statistics class. What percentage of the class consists of freshman, sophomores, and juniors?

An outlier in a data set may have a simple explanation such as a scale was not working properly or the researcher inverted the digits of a number when recording a measurement.

Chebyshevʹs rule applies to qualitative data sets, while the empirical rule applies to quantitative data sets.

Which of the graphical techniques below can be used to summarize qualitative data?

A sample of 100 e-mail users were asked whether their primary e-mail account was a free account, an institutional (school or work)account, or an account that they pay for personally. Identify the classes for the resulting data.

Chebyshevʹs rule applies to large data sets, while the empirical rule applies to small data sets.

Suppose that 50 and 75 are two elements of a population data set and their z-scores are -3 and 2, respectively. Find the mean and standard deviation.

Explain how it can be misleading to draw the bars in a histogram so that the width of each bar is proportional to its height rather than have all bars the same width.

In practice, the population mean $\mu$ is used to estimate the sample mean $\bar { x }$

An outlier is defined as any observation that falls within the outer fences of a box plot.

The total points scored by a basketball team for each game during its last season have been summarized in the table below. Which statement following the table must be true? Score Frequency 41-60 3 61-80 8 81-100 12 101-120 7

For a given data set, which is typically greater, the range or the standard deviation?

Statistics, Data, and Statistical Thinking

Probability

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Inferences Based on a Single Sample: Estimation With Confidence Intervals

Inferences Based on a Single

Inferences Based on Two Samples: Confidence Intervals and Tests of Hypotheses

Analysis of Variance: Comparing More Than Two Means

Simple Linear Regression

Multiple Regression and Model Building

Categorical Data Analysis

Nonparametric Statistics Available Online

Filters

Exam 2: Methods for Describing Sets of Data

All class intervals in a histogram have the same width.

The mean xˉ\bar { x }xˉ of a data set is 36.71, and the sample standard deviation s is 3.22. Find the interval representing measurements within one standard deviation of the mean.

Which of the following is a measure of relative standing?

The bars in a histogram should be arranged by height in descending order from left to right.

The process for finding a percentile is similar to the process for finding the median.

A shoe company reports the mode for the shoe sizes of menʹs shoes is 12. Interpret this result.

The pie chart shows the classifications of students in a statistics class. What percentage of the class consists of freshman, sophomores, and juniors?

An outlier in a data set may have a simple explanation such as a scale was not working properly or the researcher inverted the digits of a number when recording a measurement.

Chebyshevʹs rule applies to qualitative data sets, while the empirical rule applies to quantitative data sets.

Which of the graphical techniques below can be used to summarize qualitative data?

A sample of 100 e-mail users were asked whether their primary e-mail account was a free account, an institutional (school or work)account, or an account that they pay for personally. Identify the classes for the resulting data.

Chebyshevʹs rule applies to large data sets, while the empirical rule applies to small data sets.

Suppose that 50 and 75 are two elements of a population data set and their z-scores are -3 and 2, respectively. Find the mean and standard deviation.

Explain how it can be misleading to draw the bars in a histogram so that the width of each bar is proportional to its height rather than have all bars the same width.

In practice, the population mean μ\muμ is used to estimate the sample mean xˉ\bar { x }xˉ

An outlier is defined as any observation that falls within the outer fences of a box plot.

The total points scored by a basketball team for each game during its last season have been summarized in the table below. Which statement following the table must be true? Score Frequency 41-60 3 61-80 8 81-100 12 101-120 7

For a given data set, which is typically greater, the range or the standard deviation?

Statistics, Data, and Statistical Thinking

Probability

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Inferences Based on a Single Sample: Estimation With Confidence Intervals

Inferences Based on a Single

Inferences Based on Two Samples: Confidence Intervals and Tests of Hypotheses

Analysis of Variance: Comparing More Than Two Means

Simple Linear Regression

Multiple Regression and Model Building

Categorical Data Analysis

Nonparametric Statistics Available Online

Filters

The mean $\bar { x }$ of a data set is 36.71, and the sample standard deviation s is 3.22. Find the interval representing measurements within one standard deviation of the mean.

In practice, the population mean $\mu$ is used to estimate the sample mean $\bar { x }$