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Answer S2 = sample standard deviation = 18.05494011 and = sample mean = 18.42635659

Here is how:

What is the variance and mean of the population from which the following data was sampled:

Value

Frequency

27

102

13

1

0

7

-12

13

24

0

-39

6

 

Enter Data

Value

;

Frequency

Enter

[2] [7]

[SHIFT] [,]

[1] [0] [2]

[M+]

[1] [3]

[SHIFT] [,]

[1]

[M+]

[0]

[SHIFT] [,]

[7]

[M+]

[(-)] [1] [2]

[SHIFT] [,]

[1] [3]

[M+]

[2] [4]

[SHIFT] [,]

[0]

[M+]

[(-)] [3] [9]

[SHIFT] [,]

[6]

[M+]

Find Variance based on sample:

[SHIFT] [3] [=] to get the sample standard deviation (18.05494011)

[X2] [=] to get the sample variance (325.9808624)

Find Mean:

[SHIFT] [1] [=]

Your display should read 18.42635659

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