Measures of Variation

How do you find the Interquartile Range?

• divide the 3rd quartile by the 1st quartile

• subtract the biggest number by the smallest number

• divide the biggest number by the smallest number

• subtract the 3rd quartile from the 1st quartile

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?

• 193

• 127

• 60

• 66

Find the IQR of the following set of scores:
12, 9, 4, 6, 5, 8, 9, 4, 10, 2

• 5

• 9

• 10

• no IQR

Describe the gaps in the distribution.

• There are no gaps in the data.

• There is a gap at 2.7

• There is a gap at 2.1

What would be the best measure of variation for the following data?

• Standard Deviation

• 5 Number Summary

• Mean

• Mode

The frequency table shows the gas mileages of several vehicles. The data would be ​ (a)   so the best measure of center would be the ​ (b)   and the best measure of variation would be the ​ (c)   ​ ​

• Skewed Right

• median

• Interquartile Range

• Skewed Left

• Symmetrical

• Mean

• Mean Absolute Deviation

What are the Measures of Variation?

• Q1, Q3, IQR and Range

• Numbers much larger or much smaller than the data set. Numbers that "lie outside" the other values

• Mean, Median and Range

• Mean, Median and Mode

What is the interquartile range of the data set below?

• 3

• 6

• 2

• 8

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?

• 193

• 127

• 60

• 66

What 5 items are found when finding the Measures of Variation?

• mean, median, mode, range, IQR

• median, first quartile, third quartile, range, mode

• median, first quartile , third quartile, IQR, range

• mode, IQR, range, mean, first quartile