Measures of Spread

A farmer recorded the amount of cherries sold in the past 5 days.

What is the range of the number of kilograms sold?

What is the range?

• The sum of the largest and smallest number

• The number in the middle

• The difference between the largest and smallest number

• The number that appears most often

What is the range?

• 6

• 2 - 8

• 3

• 4

What is the standard deviation for the data given:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

What does this symbol represent?

• Standard Deviation

• Variance

• Mean Absolute Deviation

• Sigma

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

Given a variance of 64, what is the standard deviation?

• 8

• 4096

• 0

• 6.8

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1

• 2

• 3

• 4

What is the formula for calculating the interquartile range (IQR)?

• Q3 - Q1

• Q1 + Q3

• Maximum - Minimum

• Mean - Median

What does a small standard deviation indicate?

• Data values are far from the mean

• Data values are close to the mean

• Data set has outliers

• Data set has a large range