Make your own free website on Tripod.com

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

Your calculator should be in single-variable statistical mode. The statistical registers should be cleared [2ndF] [DEL]

Enter Data

Value

,

Frequency

Enter

[2] [7]

[STO]

[1] [0] [2]

[M+]

[1] [3]

[STO]

[1]

[M+]

[0]

[STO]

[7]

[M+]

[+/-] [1] [2]

[STO]

[1] [3]

[M+]

[2] [4]

[STO]

[0]

[M+]

[+/-] [3] [9]

[STO]

[6]

[M+]

Find Variance based on sample:

[RCL] [5] to get the sample standard deviation (18.05494011)

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

Find Mean:

[RCL] [4]

Your display should read 18.42635659

Click here to return to calculator section