Question: Two independent experiments are run in which two different types of paint are compared. Eighteen specimens are painted using type A, and the drying

Two independent experiments are run in which two different types of paint are compared. Eighteen specimens are painted using type A, and the drying time, in hours, is recorded for each. The same is done with type B. The population standard deviations are both known to be 1.0. Assuming that the mean drying time is equal for the two types of paint, find P(XA-XB> 1.0), where XA and XB are average drying times for samples of size nA = nB = 18.

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