Homework Help: Sampling Distribution

Posted by Rhea on Wednesday, February 27, 2013 at 10:53pm.

Sampling Distribution
Complete solutions and illustrations are required.

2.In a study of life expectancy, it was found that the mean age at death in the Philippines was 72 with a standard deviation of 5.8 years. If a sample of 50 Filipino people is selected, find the probability that the mean life expectancy will be,
a.Less than 70 years old.
b.Between 68 and 75 years.

Sampling Distribution - PsyDAG, Thursday, February 28, 2013 at 11:35am
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 related to the Z score.

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