In: Statistics and Probability
The annual per capita (average per person) chewing gum consumption in the United States is 200 pieces. Suppose that the standard deviation of per capita consumption of chewing gum is 145 pieces per year.
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P(z<Z) table :
a.
SD of sample = (population SD)/(n^0.5)
= 145/(84^0.5)
= 15.82
b.
SD of sample = (population SD)/(n^0.5)
= 145/(84^0.5)
= 15.82
c.
SD of sample = (population SD)/(n^0.5)
= 145/(16^0.5)
= 36.25
(please UPVOTE)