The following data represent the length of time, in days, to recovery for patients randomly treated with one of two medications to clear up severe
The following data represent the length of time, in days, to recovery for patients randomly treated with one of two medications to clear up severe bladder infections. Find a 90% confidence interval for the difference 2 - , between in the mean recovery times for the two medications, assuming normal populations with equal variances. Medication 1 n, = 11 X1 = 14 $2 = 1.2 Medication 2 n2 = 19 X2 = 16 = 1.8 Click here to view nane 1 of the table of critical values of the t-distribution . . . The confidence interval is
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