The average age of a parttime seasonal employee at a Vail Re

The average age of a part-time seasonal employee at a Vail Resorts ski mountain has historically been 37 years. State the null and alternative hypotheses.State the hypotheses one would use to test if this average has decreased since the last season.

Solution

well in this situation the null hypothesis will be that mean is equal to 37 years

the alternative hypothesis will be that mean is different from 37 years

for the other case, if the average has decreased since the last season

the null hypothesis will be that the mean is lower or equal than the last season

the alternative hypothesis will be that mean is greater than the last season