A sample of 50 gas stations throughout the US found the mean price for a gallon of gas to be $3.61 with s = 0. Test the claim that the mean price for...

A sample of 50 gas stations throughout the US found the mean price for a gallon of gas to be $3.61 with s = 0.16.

Test the claim that the mean price for a gallon of gas is $3.90 per gallon.

Find the critical value(s) and test statistic for this hypothesis test.