Question 1132070
Assuming normality, random sample and s being an unbiased estimator of sigma, all that
test statistic is a t 0.975, df=48
critical value |t|>2.01
calculation (x bar-mean)s/sqrt(48)
that is (-365)/351/sqrt(48)
which is -7.20 and strongly reject Ho that the two are equal with p<<0.0001