Mathematics, 28.05.2020 21:58, Jspice1996

A random sample of the price of gasoline from 40 gas stations in a region gives the statistics below. Complete parts a) through c). y overbarequals$3.59, sequals$0.26 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. (nothing comma nothing )(Round to three decimal places as needed.) b) Find the 90% confidence interval for the mean. (nothing comma nothing )(Round to three decimal places as needed.) c) If we had the same statistics from a sample of 80 stations, what would the 95% confidence interval be now? (nothing comma nothing )(Round to three decimal places as needed.)

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A random sample of the price of gasoline from 40 gas stations in a region gives the statistics below...