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December 20, 2014

December 20, 2014

Posted by **Cam** on Monday, April 15, 2013 at 10:41am.

1. Identify the population mean.

2. Identify the population standard deviation.

3. Suppose a random sample of 15 people over 55 is selected. What is the probability that the sample mean is above 9?

4. Suppose a random sample of 100 people over 55 is selected. What is the probability that the sample mean will be below 7?

- statistics -
**PsyDAG**, Monday, April 15, 2013 at 12:15pmWith your data, these are the best estimates.

1. 8

2. 2

3. Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability relate to the Z score.

4. Same process as 3.

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