Question 1

When looking at a color map that uses colors to represent values, blue signifies larger values and red signifies smaller values.

Accepted Answer

A) True 
 B)False

Question 2

When designing a table of data values, the rows should always be arranged such that the category with the largest number of values is at the top with the values descending until the last row has the smallest number of values.

Accepted Answer

A) True 
 B)False

Question 3

What of the following is the best approach to deciding on the number of bins for a histogram?

Accepted Answer

A)  The number of bins should be approximately 20% of the number of data values. 
B)  There is a formula, number of bins = 1 + ln(n)/ln(2), that should always be used to set the number of bins. 
C)  There is no strict rule; the number of bins should be chosen to best show patterns. 
D)  There should be no less than 5 bins and no more than 20. 
A)  The number of bins should be approximately 20% of the number of data values. 
B)  There is a formula, number of bins = 1 + ln(n)/ln(2), that should always be used to set the number of bins. 
C)  There is no strict rule; the number of bins should be chosen to best show patterns. 
D)  There should be no less than 5 bins and no more than 20.

Question 4

Consider the data table that indicates how many subjects in a skin cancer study had various numbers of moles on their backs. Which of the histograms correctly depicts the data?
?
Frequency table showing the number of moles on the backs of 55 subjects.

$\begin{array}{lc}
\begin{array}{l}
\text { Number of } \
\text { moles }
\end{array} & \begin{array}{l}
\text { Number } \
\text { of subjects }
\end{array} \
\hline 0-5 & 15 \
6-10 & 22 \
11-15 & 7 \
16-20 & 8 \
21-25 & 3
\end{array}$ ?
  ?

Accepted Answer

A)  Chart A 
B)  Chart B 
C)  Chart C 
D)  Chart D 
A)  Chart A 
B)  Chart B 
C)  Chart C 
D)  Chart D

Question 5

If you saw a graph with rectangles standing on a horizontal axis, what is the best immediate visual clue to determine whether it is likely to be a well-designed bar chart or a histogram?

Accepted Answer

A)  If the x-axis has numbers or labels. 
B)  If the y-axis goes to zero or some other number. 
C)  Whether it is black and white or in color. 
D)  Whether the bars are solid or filled with patterns. 
A)  If the x-axis has numbers or labels. 
B)  If the y-axis goes to zero or some other number. 
C)  Whether it is black and white or in color. 
D)  Whether the bars are solid or filled with patterns.

Question 6

Consider the histogram shown. What two words describe the skew?
​
  ​

Accepted Answer

A)  Left skewed, negative skew 
B)  Left skewed, positive skew 
C)  Right skewed, negative skew 
D)  Right skewed, positive skew 
A)  Left skewed, negative skew 
B)  Left skewed, positive skew 
C)  Right skewed, negative skew 
D)  Right skewed, positive skew

Question 7

Consider the histogram of a data set shown. Which of the following values is the mode of the data set?
​
  ​

Accepted Answer

A)  6 
B)  7 
C)  12 
D)  24 
A)  6 
B)  7 
C)  12 
D)  24

Question 8

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms would be used for the data point indicated with the arrow?
​
  ​

Accepted Answer

A)  A deviation. 
B)  An exception. 
C)  An outlier. 
D)  A scattered point. 
A)  A deviation. 
B)  An exception. 
C)  An outlier. 
D)  A scattered point.

Question 9

Essentially, all professional statistics software programs can read data files saved as .csv or text files, but not all will read Excel formats.

Accepted Answer

A) True 
 B)False

Question 10

Distinguish between absolute and relative frequencies with regard to a data set.

Accepted Answer

Absolute frequency and relative frequenc

Question 11

Consider an experiment in which female and male rats are weighed and then their food consumption is measured. Which of the following is a flaw in the figure showing data from this experiment?
​
  ​

Accepted Answer

A)  Data for an unequal number of subjects for each of the two sexes are displayed. 
B)  The pair of colors, red and green, is used. 
C)  The groups have both different colors and different shapes, which is redundant; only one aspect of the symbols should differ. 
D)  The wrong variables are plotted on the axes; they should be switched. 
A)  Data for an unequal number of subjects for each of the two sexes are displayed. 
B)  The pair of colors, red and green, is used. 
C)  The groups have both different colors and different shapes, which is redundant; only one aspect of the symbols should differ. 
D)  The wrong variables are plotted on the axes; they should be switched.

Question 12

Which of the following is NOT a good thing to do when designing a data table?

Accepted Answer

A)  Arrange quantitative categories by order of value. 
B)  Arrange unordered categorical variables in alphabetical order. 
C)  Arrange unordered categorical variables in order of importance. 
D)  Arrange unordered categorical variables in their natural order, if they have one. 
A)  Arrange quantitative categories by order of value. 
B)  Arrange unordered categorical variables in alphabetical order. 
C)  Arrange unordered categorical variables in order of importance. 
D)  Arrange unordered categorical variables in their natural order, if they have one.

Question 13

Imagine you have length and weight data for two sets of mice: wildtype mice and ones with a genetic mutation for bone growths. Describe a scientific question using these mice that would be best analyzed with a scatter plot and a different question that would be best approached using a violin plot.

Accepted Answer

A scientific question that would be best

Question 14

When designing a bar graph, which of the following is NOT something that should generally be done?

Accepted Answer

A)  Bar heights should be proportional to the number of observations. 
B)  Bars should stand apart with small gaps between them. 
C)  Nominal categories should be ordered by frequency, from largest to smallest. 
D)  Ordinal categories should be ordered by frequency, from largest to smallest. 
A)  Bar heights should be proportional to the number of observations. 
B)  Bars should stand apart with small gaps between them. 
C)  Nominal categories should be ordered by frequency, from largest to smallest. 
D)  Ordinal categories should be ordered by frequency, from largest to smallest.

Question 15

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms is the best technical description of the data shown?
​
  ​

Accepted Answer

A)  A casual relationship. 
B)  A causal relationship. 
C)  A positive relationship. 
D)  An upward relationship. 
A)  A casual relationship. 
B)  A causal relationship. 
C)  A positive relationship. 
D)  An upward relationship.

When looking at a color map that uses colors to represent values, blue signifies larger values and red signifies smaller values.

When designing a table of data values, the rows should always be arranged such that the category with the largest number of values is at the top with the values descending until the last row has the smallest number of values.

What of the following is the best approach to deciding on the number of bins for a histogram?

If you saw a graph with rectangles standing on a horizontal axis, what is the best immediate visual clue to determine whether it is likely to be a well-designed bar chart or a histogram?

Consider the histogram shown. What two words describe the skew?

Consider the histogram of a data set shown. Which of the following values is the mode of the data set?

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms would be used for the data point indicated with the arrow?

Essentially, all professional statistics software programs can read data files saved as .csv or text files, but not all will read Excel formats.

Distinguish between absolute and relative frequencies with regard to a data set.

Consider an experiment in which female and male rats are weighed and then their food consumption is measured. Which of the following is a flaw in the figure showing data from this experiment?

Which of the following is NOT a good thing to do when designing a data table?

Imagine you have length and weight data for two sets of mice: wildtype mice and ones with a genetic mutation for bone growths. Describe a scientific question using these mice that would be best analyzed with a scatter plot and a different question that would be best approached using a violin plot.

When designing a bar graph, which of the following is NOT something that should generally be done?

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms is the best technical description of the data shown?

Statistics and Samples

Describing Data

Estimating With Uncertainty

Probability

Hypothesis Testing

Analyzing Proportions

Fitting Probability Models to Frequency Data

Contingency Analysis: Associations Between

The Normal Distribution

Inference for a Normal Population

Comparing Two Means

Handling Violations of Assumptions

Designing Experiments

Comparing Means of More Than Two Groups

Correlation Between Numerical Variables

Regression

Multiple Explanatory Variables

Computer-Intensive Methods

Likelihood

Meta-Analysis: Combining Information From

Filters

Exam 2: Displaying Data

When looking at a color map that uses colors to represent values, blue signifies larger values and red signifies smaller values.

When designing a table of data values, the rows should always be arranged such that the category with the largest number of values is at the top with the values descending until the last row has the smallest number of values.

What of the following is the best approach to deciding on the number of bins for a histogram?

If you saw a graph with rectangles standing on a horizontal axis, what is the best immediate visual clue to determine whether it is likely to be a well-designed bar chart or a histogram?

Consider the histogram shown. What two words describe the skew? ​ ​

Consider the histogram of a data set shown. Which of the following values is the mode of the data set? ​ ​

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms would be used for the data point indicated with the arrow? ​ ​

Essentially, all professional statistics software programs can read data files saved as .csv or text files, but not all will read Excel formats.

Distinguish between absolute and relative frequencies with regard to a data set.

Consider an experiment in which female and male rats are weighed and then their food consumption is measured. Which of the following is a flaw in the figure showing data from this experiment? ​ ​

Which of the following is NOT a good thing to do when designing a data table?

Imagine you have length and weight data for two sets of mice: wildtype mice and ones with a genetic mutation for bone growths. Describe a scientific question using these mice that would be best analyzed with a scatter plot and a different question that would be best approached using a violin plot.

When designing a bar graph, which of the following is NOT something that should generally be done?

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms is the best technical description of the data shown? ​ ​

Statistics and Samples

Describing Data

Estimating With Uncertainty

Probability

Hypothesis Testing

Analyzing Proportions

Fitting Probability Models to Frequency Data

Contingency Analysis: Associations Between

The Normal Distribution

Inference for a Normal Population

Comparing Two Means

Handling Violations of Assumptions

Designing Experiments

Comparing Means of More Than Two Groups

Correlation Between Numerical Variables

Regression

Multiple Explanatory Variables

Computer-Intensive Methods

Likelihood

Meta-Analysis: Combining Information From

Filters

Consider the histogram shown. What two words describe the skew?

Consider the histogram of a data set shown. Which of the following values is the mode of the data set?

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms would be used for the data point indicated with the arrow?

Consider an experiment in which female and male rats are weighed and then their food consumption is measured. Which of the following is a flaw in the figure showing data from this experiment?

Consider an experiment in which rats are weighed and then their food consumption is measured. Which of the following terms is the best technical description of the data shown?