Question: QUESTION 21 Use the standard normal distribution = or the t-distribution E-construct a 95% confidence interval for the population mean if applicable. From a

QUESTION 21 Use the standard normal distribution = or the t-distribution E-construct a 95% confidence interval for the population mean if applicable. From a random sample of 48 days in a recent year, U.S gas prices had a mean of $3.63. The population standard deviation was $0.28 Oa. (3.50, 3.70) Ob. (3.00, 4.26) Oc. (3.55, 3.71) d. neither can be used

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