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In a study to compare the effects of two pain relievers it was found that of...

In a study to compare the effects of two pain relievers it was found that of n1 = 200 randomly selected individuals who used the first pain reliever, 0.92% indicated that it relieved their pain. Of n2 = 450 randomly selected individuals who used the second pain reliever, 0.96% indicated that it relieved their pain.

(a)

Find a 99% confidence interval for the difference in the proportions experiencing relief from pain for these two pain relievers. (Use p1 − p2.) Round your answers to three decimal places.)

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