Solve this question please

We want to decide whether the average age of people, buried in family cemeteries in Durham between 1890 and 1920, was 29. We want to hypothesis test using a 90% confidence interval: this means we expect to be wrong % of the time. Using a sample of size 60, we find the sample mean is 39 and the sample SD is 28. The margin of error for our confidence interval is So the 90% confidence interval is [ To decide whether to reject the null hypothesis, we check whether the number belongs to the interval