Insure.com reports that the mean annual premium for automobile insurance in the United States was $1,365 in 2018. Being from Pennsylvania, you believe automobile insurance is cheaper there, and you wish to develop statistical support for your opinion. A sample of 25 automobile insurance policies from the state of Pennsylvania showed a mean annual premium of $1,278 with a standard deviation of of
s = $160.
(Use š¼ = 0.05.)
Find the value of the test statistic. (Round your answer to three decimal places.)