The length of time taken to recovery was recorded for patients randomly assigned and subjected to two different surgical procedures. The data (recorded in days) are given below:
Procedure 1
n =23
x = 7.3
s^2 =1.23
Procedure 2
n =21
x = 8.9
s^2 =1.49
a) Test (at alpha=1) whether it is reasonable to use an equal variances test of the difference between the means. (Use the F-test)
b) Do the data provide evidence to indicate a difference between the mean recovery times for the two surgical procedures? Use alpha=0.05
Make sure you use the correct test following your conclusion from part a)
Procedure 1
n =23
x = 7.3
s^2 =1.23
Procedure 2
n =21
x = 8.9
s^2 =1.49
a) Test (at alpha=1) whether it is reasonable to use an equal variances test of the difference between the means. (Use the F-test)
b) Do the data provide evidence to indicate a difference between the mean recovery times for the two surgical procedures? Use alpha=0.05
Make sure you use the correct test following your conclusion from part a)