Understanding Data Distributions

Which of the following is a graphical representation of numeric data?

• Dot plot

• Pie chart

• Line graph

• Bar graph

What is the mode of the following data set: 5, 7, 8, 8, 9, 10, 10, 10?

• 8

• 9

• 10

• 7

What is the median of the following data set: 3, 5, 7, 9, 11?

• 5

• 7

• 9

• 11

Which of the following is a measure of spread in a data set?

• Mean

• Median

• Range

• Mode

What is the interquartile range (IQR) of the following data set: 2, 4, 6, 8, 10, 12, 14?

• 4

• 6

• 8

• 10

Which of the following graphical representations is best for showing the distribution of a data set?

• Box plot

• Line graph

• Pie chart

• Scatter plot

In a relative frequency table, what does the sum of all relative frequencies equal?

• 0

• 0.5

• 1

• 100

What is the purpose of a stem-and-leaf plot?

• To show the frequency of data

• To display the relationship between two variables

• To compare parts of a whole

• To show changes over time

Which of the following best describes the shape of a data distribution that is symmetric?

• Skewed left

• Skewed right

• Bell-shaped

• Uniform

What is the range of the following data set: 15, 22, 29, 34, 40?

• 5

• 15

• 25

• 40