Measures of Variation

Which measure of variation is the difference between the maximum and minimum of the data?

• mean

• interquartile range (IQR)

• range

• median

This is used to describe the distribution of the data

• outlier

• range

• measures of variation

• quartile

What does this symbol represent?

• Population Standard Deviation
• Population Variance
• Sample Variance
• Sample Standard Deviation

What does this symbol represent?

• Population Variance
• Population Standard Deviation
• Sample Variance
• Sample Standard Deviation

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

 Find the sample standard deviation.
2  6  15  9  11  22  

• 49.37

• 7.03

Standard deviation is always the __________ of variance.

• square root
• square
• median of
• mean of

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

Four data sets are shown below.
Set 1: {10, 19, 38, 50, 51}
Set 2: {5, 21, 26, 39, 51}
Set 3: {9, 38, 50, 50, 51}
Set 4: {5, 28, 28, 28, 51}
Which data set has the largest standard deviation?

• Set 1
• Set 2
• Set 3
• Set 4

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

• 8

• 4096

• 0

• 6.8