Question
a random sample of the price of gasoline from 20 gas stations in a region gives...
a
random sample of the price of gasoline from 20 gas stations in a
region gives the statistics below.
ÿ= 3.49. s=$0.29
a) Find a 95% confidence interval for the mean price of
regular gasoline in that region.
b) Find the 90% confidence interval for the mean.
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