Question

A simple random sample of size n=81 is obtained from a population with μ=77 and σ=27....

A simple random sample of size

n=81

is obtained from a population with

μ=77

and

σ=27.

​(a) Describe the sampling distribution of

x.

​(b) What is

P x>80.9​?

​(c) What is

P x≤69.95​?

​(d) What is

P 72.8<x<83.9​?

Math   Statistics-And-Probability   
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b)c)d)

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