The following data recorded in days represent the length of

The following data. recorded in days, represent the length of time to recovery for patients randomly treated with one of two medications to clear lip severe bladder infections. Assume that the data come from normal populations with equal variance. Test the hypothesis that the two population means are the same against the alternative that the first mean is smaller. Use 5% and 1% significance levels.

Solution

H0= The 2 population means are the same.

H1= The first mean is smaller