A consumer analyst reports that the mean life of a certain type of automobile battery is not 74 months
Ho: mean life is 74 months (i.e. Ho:µ = 74) and Ha: Mean life is not 74 months (i.e. Ha: µ≠74)
•Find the test statistic.
•Find the p-value
•Decide whether to reject the null hypothesis.
•Interpret the decision in the context of the original claim.