Question

22 Find the MEAN and the SAMPLE standard deviation for the following: Year Return 1 12%...

22 Find the MEAN and the SAMPLE standard deviation for the following:

Year Return

1 12%

2 -16

3 8

4 11

Find the population MEAN and Standard deviation for the following

Year Return Probability

1 12% 40%

2 -16 15%

3 8 25%

4 11 20%

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Homework Answers

Answer #1

1. Mean = Total/no of items = (12-16+8+11)/4 =3.75%

Standard Deviation = 11.497%

Year X X-X)^2
1 12 68.0625
2 -16 390.0625
3 8 18.0625
4 11 52.5625
Total 15 528.75
Average 3.75 132.1875
SD 11.49728

2. Population Mean = 6.60 or 7% (appx) and SD = 9.62%

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