WGU C955 - Module 4: Descriptive
Statistics for a Single Variable with
Complete Solutions
If 200 people are surveyed, how many claim to have had no exercise?
{{ Pie chart reflecting the average number of hours exercised per week. No exercise
36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours
4%, more than 7 hours 2%. }}
a 18
b 36
c 72
d Cannot determine - ANSWER-72
Determine the range for the following data set. {1,24,26,28,32,36,38,40,65}
a 1 to 65
b 64
c 65
d Cannot determine - ANSWER-64
It is important to start the frequency scale on a bar chart at which value to be certain not
to overemphasize a difference in values?
a Zero
b The lowest measured value
c The smallest frequency
d As long as the scale is even, it doesn't matter where you start it. - ANSWER-Zero
If 80 people exercised 4 - 5 hours per week, how many people were surveyed?
{{ Pie chart reflecting the average number of hours exercised per week. No exercise
36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours
4%, more than 7 hours 2%. }}
a 80
b 800
c 400
d 50 - ANSWER-800
, You are a professional trainer at a local sports academy. You ask your athletes to
determine the number of grams of protein they consume for a particular meal. Which of
the following would be the best choice to illustrate the shape of the data you collect?
a Bar chart
b Pie chart
c Box plot
d None of the above - ANSWER-Box plot
What is the most significant difference between histograms and bar charts?
a The number of bars used
b The use of labels on the axes
c The type of data depicted in the graph
d The coloring used for each bar - ANSWER-The type of data depicted in the graph
Of the following sets of data, which would you assume should have the greatest range?
a Age when a baby gets their first tooth
b Age of first-year business students
c Age of death
d Age of high school graduate - ANSWER-Age of death
Determine any outliers in the following data set. {1,24,26,28,32,36,38,40,65}
a1
b 65
c A and B
d None - ANSWER-A and B
Determine the interquartile range ( IQR ) for the following set of diagnostic test scores.
{60,47,65,85,81,77,70,56,47,84,75}
a 25
b 57
c 68
d 80 - ANSWER-25
Stem plots display which type of data?
a Quantitative
b Categorical
c Neither Quantitative nor categorical
d Quantitative and categorical - ANSWER-Quantitative
Determine the median for the following set of diagnostic test scores.
{60,47,65,85,81,77,70,56,47,84,75}
Statistics for a Single Variable with
Complete Solutions
If 200 people are surveyed, how many claim to have had no exercise?
{{ Pie chart reflecting the average number of hours exercised per week. No exercise
36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours
4%, more than 7 hours 2%. }}
a 18
b 36
c 72
d Cannot determine - ANSWER-72
Determine the range for the following data set. {1,24,26,28,32,36,38,40,65}
a 1 to 65
b 64
c 65
d Cannot determine - ANSWER-64
It is important to start the frequency scale on a bar chart at which value to be certain not
to overemphasize a difference in values?
a Zero
b The lowest measured value
c The smallest frequency
d As long as the scale is even, it doesn't matter where you start it. - ANSWER-Zero
If 80 people exercised 4 - 5 hours per week, how many people were surveyed?
{{ Pie chart reflecting the average number of hours exercised per week. No exercise
36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours
4%, more than 7 hours 2%. }}
a 80
b 800
c 400
d 50 - ANSWER-800
, You are a professional trainer at a local sports academy. You ask your athletes to
determine the number of grams of protein they consume for a particular meal. Which of
the following would be the best choice to illustrate the shape of the data you collect?
a Bar chart
b Pie chart
c Box plot
d None of the above - ANSWER-Box plot
What is the most significant difference between histograms and bar charts?
a The number of bars used
b The use of labels on the axes
c The type of data depicted in the graph
d The coloring used for each bar - ANSWER-The type of data depicted in the graph
Of the following sets of data, which would you assume should have the greatest range?
a Age when a baby gets their first tooth
b Age of first-year business students
c Age of death
d Age of high school graduate - ANSWER-Age of death
Determine any outliers in the following data set. {1,24,26,28,32,36,38,40,65}
a1
b 65
c A and B
d None - ANSWER-A and B
Determine the interquartile range ( IQR ) for the following set of diagnostic test scores.
{60,47,65,85,81,77,70,56,47,84,75}
a 25
b 57
c 68
d 80 - ANSWER-25
Stem plots display which type of data?
a Quantitative
b Categorical
c Neither Quantitative nor categorical
d Quantitative and categorical - ANSWER-Quantitative
Determine the median for the following set of diagnostic test scores.
{60,47,65,85,81,77,70,56,47,84,75}
