Mean Median Standard Deviation and Variance

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

• 45

• 40

• 38

• 35

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 is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 47.47

• 102.01

• 52.77

• 81

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

• 8

• 4096

• 0

• 6.8

Company A has a mean and standard deviation of 23 and 13, respectively.
While Company B has a mean and variance of 20 and 225, respectively.
Which company has a more consistent distribution?

• A

• B

A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

Label both numbers with their appropriate symbol.

​ (a)   = 20.7 and ​ (b)   = 2.5

• 𝜇

• 𝜎

A study of all the students at a small college showed a mean age of 20.7 and a standard deviation of 2.5 years.

Label both numbers with their appropriate symbol.

​ (a)   = 20.7 and ​ (b)   = 2.5

• 𝜇

• 𝜎

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

• 8

• 7.5

• 7.5

• 10

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

• 42.76 cm

• 42.76

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

• 10

• 3

• 5