Arithmetic Mean, Variance,Standard Deviation,and Expectation

Find the mean of the given data 8, 7, 5, 9, 6, 13

• 8

• 7.5

• 10

• 12

Find the mean of the given data 21.5 cm, 63.7 cm, 18.9 cm, 34.1 cm, 75.6 cm

• 44 cm

• 43 cm

• 42.7 cm

• 48 cm

The number of goals scored by seven forwards in one soccer season were 8, 6, 4, 8, 3, 1, and 5. Find the mean number of goals scored by the seven forward

• 20

• 3

• 10

• 5

The masses of six children are 34.5 kilograms, 42.6 kilograms, 39.8 kilograms, 40.1 kilograms, 53.4 kilograms, and 33.8 kilograms. Find the mean mass.

• 40.7 kg

• 40 kg

• 41 kg

• 50 kg

Find the mean of 3, 7, 9, 9 12.

• 5

• 8

• 6

• 4

Find the mean of the following numbers 40, 38, 46, 38, 51 and 57.

• 54

• 38

• 45

• 35

What is the standard deviation for the data given:

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

• 7.26

• 6.89

• 10.1

• 9

What is the variance for the data given:

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

• 47.43

• 52.77

• 102.01

• 81

Which of the following is a measure of variability?

• mean

• median

• mode

• standard devitation

If the standard deviation of a data set is 4, what is the variance?

• 2

• 4

• 16