Apply the nonpooled t-interval procedure to obtain the required confidence interval. You may assume that the
assumptions for using the procedure are satisfied.
A paint manufacturer wished to compare the drying times of two different types of paint. Independent simple random samples of 11 cans of type A and 9 cans of type B were selected and applied to similar surfaces. The drying times, in hours, were recorded. The summary statistics are as follows.
|Type A||Type B|
|X1 = 74.3||X2 = 64.5|
|s1 = 4.5||s2= 5.1|
|n1 = 11||n2 = 9|
Determine a 98% confidence interval for the difference, between the mean drying time for type A and the mean drying time for type B.
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