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The National Coffee Association reported that64 % of U.S. adults drink coffee daily. A random sample of225 U.S. adults is selected. (a) Find the mean
The National Coffee Association reported that64
%
of U.S. adults drink coffee daily. A random sample of225
U.S. adults is selected.
(a) Find the mean
p
.(b) Find the standard deviation
p
.(c) Find the probability that more than69
%
of the sampled adults drink coffee daily.(d) Find the probability that the proportion of the sampled adults who drink coffee daily is between0.6
and0.72
.(e) Find the probability that less than59
%
of sampled adults drink coffee daily.(f) Would it be unusual if less than60
%
of the sampled adults drink coffee daily?
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