Answer: μ = Population mean = 12; σ² = Population variance = 1274.666667

Here is how:

What is the mean and variance of the following population.

 24
 74
 21
-25
 13
-35

Make sure your calculator is in SD mode. Clear the statistical memories by pressing [SHIFT] [AC] [=]

Enter Data

       [2] [4] [M+]
       [7] [4] [M+]
       [2] [1] [M+]
[(-)] [2] [5] [M+]
       [1] [3] [M+]
[(-)] [3] [5] [M+]

Find Mean:

[SHIFT] [1] [=]

Your display should read 12

Find Variance based on entire population:

[SHIFT] [2] [=] to get the population standard deviation (35.70247424)

[X²] [=] to get the population variance (1274.666667)

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