Question 1

Which of the following statements is false?

Accepted Answer

A) If the standard deviation is positive, the mean must be positive. 
B) The standard deviation can be negative. 
C) If the mean is large, the standard deviation will be large also. 
D) All of the above are false. 
A) If the standard deviation is positive, the mean must be positive. 
B) The standard deviation can be negative. 
C) If the mean is large, the standard deviation will be large also. 
D) All of the above are false.

Question 2

For Questions , use the following narrative
Narrative: School costs
Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below:
   
-{School cost narrative} What is the shape of this data set?

Accepted Answer

Skewed to the right.

Question 3

One or two scores that are far removed from the rest of the data are called __________.

Accepted Answer

The answer of One or two scores that are far...

Question 4

Which of the following is not included in the five-number summary?

Accepted Answer

A) Mean 
B) Median 
C) Lower quartile 
D) Highest number 
E) All of the above are included in the five-number summary. 
A) Mean 
B) Median 
C) Lower quartile 
D) Highest number 
E) All of the above are included in the five-number summary.

Question 5

The mode is most meaningful for which type of data?

Accepted Answer

A) Measurement data 
B) Categorical data 
C) Biased data 
D) None of the above 
A) Measurement data 
B) Categorical data 
C) Biased data 
D) None of the above

Question 6

Suppose a data set is skewed left.What is the most likely relationship between the mean and the median?

Accepted Answer

A) The mean is larger than the median. 
B) The mean is smaller than the median. 
C) The mean and the median are not related to each other at all. 
D) The mean and the median are essentially equal. 
A) The mean is larger than the median. 
B) The mean is smaller than the median. 
C) The mean and the median are not related to each other at all. 
D) The mean and the median are essentially equal.

Question 7

How do you calculate the interquartile range for a data set?

Accepted Answer

A) Take the highest value minus the lowest value and divide it by four. 
B) Subtract the value of the lower quartile from the upper quartile. 
C) Subtract the value of the upper quartile from the lower quartile. 
D) Divide the data set into four equal parts and find the range between each of the resulting quarters. 
A) Take the highest value minus the lowest value and divide it by four. 
B) Subtract the value of the lower quartile from the upper quartile. 
C) Subtract the value of the upper quartile from the lower quartile. 
D) Divide the data set into four equal parts and find the range between each of the resulting quarters.

Question 8

For Questions , use the following narrative
Narrative: Acceptance rates
A random sample of 50 colleges and universities in the U.S.was selected, and acceptance rates were recorded for each school (percentage of student applicants who were accepted to the school).The following five-number summary was calculated for this data set: lowest = 17; lower quartile = 25.75; median = 36; upper quartile = 47.75; highest = 67.
-{Acceptance rates narrative} Describe the shape of this data based on the five-number summary.

Accepted Answer

The data set looks fairly even

Question 9

A(n) __________ is any value that is more than 1.5 times the IQR from the closest end of the box in a boxplot.

Accepted Answer

The answer of A(n) __________ is any value that is...

Question 10

For Questions , use the following narrative
Narrative: Create data
Suppose you can create your own data set by choosing from the numbers 1, 2, 3, 4, and 5.You can repeat a number as many times as you wish, as long as your final data set contains four numbers in it.Here are two examples of data sets you could create: {1, 2, 3, 4} or {1, 1, 5, 5}.
-{Create data narrative} Create a data set that has the lowest possible standard deviation.

Accepted Answer

any data set contain

Question 11

If the bars of a histogram represent the proportion of the total count that falls into each interval, what must the heights of the bars sum to?

Accepted Answer

A) The total number of numbers in the data set. 
B) One. 
C) 1 divided by the total number of intervals used in the histogram. 
D) Not enough information to tell. 
A) The total number of numbers in the data set. 
B) One. 
C) 1 divided by the total number of intervals used in the histogram. 
D) Not enough information to tell.

Question 12

If the width of a box in a boxplot is very large, compared to the rest of the boxplot, what does that mean about the shape of the data set?

Accepted Answer

A) The data are very spread out in the middle. 
B) The data are clumped tightly in the middle. 
C) The data are not symmetric. 
D) Not enough information to tell. 
A) The data are very spread out in the middle. 
B) The data are clumped tightly in the middle. 
C) The data are not symmetric. 
D) Not enough information to tell.

Question 13

Which of the following can not be obtained from a boxplot?

Accepted Answer

A) Mean 
B) Median 
C) IQR 
D) Range 
E) All of the above can be obtained from a boxplot. 
A) Mean 
B) Median 
C) IQR 
D) Range 
E) All of the above can be obtained from a boxplot.

Question 14

Which of the following pictures of a data set allows you to retrieve the actual data (assuming no digits are dropped)?

Accepted Answer

A) A histogram 
B) A stemplot 
C) Both a and b 
D) Neither a nor b 
A) A histogram 
B) A stemplot 
C) Both a and b 
D) Neither a nor b

Which of the following statements is false?

For Questions , use the following narrative Narrative: School costs Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below: -{School cost narrative} What is the shape of this data set?

One or two scores that are far removed from the rest of the data are called __________.

Which of the following is not included in the five-number summary?

The mode is most meaningful for which type of data?

Suppose a data set is skewed left.What is the most likely relationship between the mean and the median?

How do you calculate the interquartile range for a data set?

A(n) __________ is any value that is more than 1.5 times the IQR from the closest end of the box in a boxplot.

If the bars of a histogram represent the proportion of the total count that falls into each interval, what must the heights of the bars sum to?

If the width of a box in a boxplot is very large, compared to the rest of the boxplot, what does that mean about the shape of the data set?

Which of the following can not be obtained from a boxplot?

Which of the following pictures of a data set allows you to retrieve the actual data (assuming no digits are dropped)?

The Benefits and Risks of Using Statistics

Reading the News

Measurements, Mistakes, and Misunderstandings

How to Get a Good Sample

Experiments and Observational Studies

Getting the Big Picture

Bell-Shaped Curves and Other Shapes

Plots, Graphs, and Pictures

Relationships Between Measurement Variables

Relationships Can Be Deceiving

Relationships Between Categorical Variables

Statistical Significance for 2 2 Tables

Understanding Probability and Long-Term Expectations

Understanding Uncertainty Through Simulation

Psychological Influences on Personal Probability

When Intuition Differs From Relative Frequency

Understanding the Economic News

The Diversity of Samples From the Same Population

Estimating Proportions With Confidence

The Role of Confidence Intervals in Research

Rejecting Chancetesting Hypotheses in Research

Hypothesis Testingexamples and Case Studies

Significance, Importance, and Undetected Differences

Meta-Analysis: Resolving Inconsistencies Across Studies

Ethics in Statistical Studies

Putting What You Have Learned to the Test

Filters

Exam 7: Summarizing and Displaying Measurement Data

Which of the following statements is false?

For Questions , use the following narrative Narrative: School costs Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below: -{School cost narrative} What is the shape of this data set?

One or two scores that are far removed from the rest of the data are called __________.

Which of the following is not included in the five-number summary?

The mode is most meaningful for which type of data?

Suppose a data set is skewed left.What is the most likely relationship between the mean and the median?

How do you calculate the interquartile range for a data set?

A(n) __________ is any value that is more than 1.5 times the IQR from the closest end of the box in a boxplot.

If the bars of a histogram represent the proportion of the total count that falls into each interval, what must the heights of the bars sum to?

If the width of a box in a boxplot is very large, compared to the rest of the boxplot, what does that mean about the shape of the data set?

Which of the following can not be obtained from a boxplot?

Which of the following pictures of a data set allows you to retrieve the actual data (assuming no digits are dropped)?

The Benefits and Risks of Using Statistics

Reading the News

Measurements, Mistakes, and Misunderstandings

How to Get a Good Sample

Experiments and Observational Studies

Getting the Big Picture

Bell-Shaped Curves and Other Shapes

Plots, Graphs, and Pictures

Relationships Between Measurement Variables

Relationships Can Be Deceiving

Relationships Between Categorical Variables

Statistical Significance for 2 2 Tables

Understanding Probability and Long-Term Expectations

Understanding Uncertainty Through Simulation

Psychological Influences on Personal Probability

When Intuition Differs From Relative Frequency

Understanding the Economic News

The Diversity of Samples From the Same Population

Estimating Proportions With Confidence

The Role of Confidence Intervals in Research

Rejecting Chancetesting Hypotheses in Research

Hypothesis Testingexamples and Case Studies

Significance, Importance, and Undetected Differences

Meta-Analysis: Resolving Inconsistencies Across Studies

Ethics in Statistical Studies

Putting What You Have Learned to the Test

Filters