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?
b)c)d)
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