Measures of Variance

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

What is the interquartile range (IQR)?

• 4

• 64

• 60

• 8

What is the Laker's MAD over the last six games? (rounded to the nearest 10th)

• 3

• 5.7

• 5

• 7

• 5.3

Which could be the trend line?

• a

• b

• c

What is the variance?

• 24.25

• 29.1

• 2

• 4.9

What is the variance for the data given:

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

The consumption of milk by a family for 11 days is as given find variance of the data 6,8,8,10,10,10,10,10,12,12, 14

• 48

• 4.8

• 11

• 10

Once you've calculated the mean, and listed the values in a table, what is the next step to calculating the variance? #27

• Square each value in the data set

• Subtract each value in the data set from the mean

• Subtract the mean from each value in the data set

• Add the mean to each value in the data set

Once you've calculated the mean, and listed the values in a table, what is the next step to calculating the variance?

• Square each value in the data set

• Subtract each value in the data set from the mean

• Subtract the mean from each value in the data set

• Add the mean to each value in the data set

Before you can begin calculating the variance, you must first: #26

• find the mean

• find the median

• find the mode

• find the range