# Lesson Worksheet: Best Measure of Variability Mathematics • 6th Grade

In this worksheet, we will practice choosing and evaluating the appropriate measure of the variability for a given data set.

Q1:

Calculate the range of the data for the data set .

Is the range the best measure of variability for the given data?

• ANo
• BYes

Q2:

When the data contains outliers, which of the following is the best measure of variability?

• AThe mode
• BThe interquartile range
• CThe variance
• DThe range
• EThe standard deviation

Q3:

Which of the following statements is not true?

• AThe interquartile range is found by subtracting the lower quartile from the upper quartile.
• BThe interquartile range is the only measure of variability.
• CThe range is the best measure of variability if the data has no outliers.
• DIf the data has outliers, then the interquartile range is the best measure of variability.
• EVariability refers to how spread out a group of data is.

Q4:

Mia’s weekly savings, in dollars, over five weeks are as follows: .

Find the range of Mia’s savings.

Find the interquartile range of Mia’s savings.

Which of them is a better measure of the variability?

• ARange
• BInterquartile range

Q5:

What measures the variability of the data set better, the range or the interquartile range?

• AInterquartile range
• BRange

Find the value of this measure.

Q6:

The following table shows the number of books donated by 8 children.

 Student Name Number of books James Jackson Charlotte Olivia Natalie Matthew Liam Scarlett 2 4 2 7 8 9 18 3

Determine the range of the data.

Find the interquartile range of the data.

Which of them is a better measure of the variability?

• ARange
• BInterquartile range

Q7:

Determine the range of the data set .

Find the interquartile range of the data.

Which of the two is the appropriate measure of variability for the given data set?

• ARange
• BInterquartile range

Q8:

What measures the variability of the data set 6, 9, 15, 13, 21, 18, 3 better, the range or the interquartile range?

• AInterquartile range
• BRange

Find the value of your choice.

Q9:

Consider the data set 0, 1, 1, 6, 8, 8, 9, 9, 11, 13. Calculate the interquartile range of the data.

Which is the best measure of variability for the given data, the range or the interquartile range?

• AThe range
• BThe interquartile range