Question: I'm having trouble solving for #13 and #15. Please shows steps and answers. In Problems 13-16, construct a confidence interval for P - Pz at

I'm having trouble solving for #13 and #15. Please shows steps and answers.

In Problems 13-16, construct a confidence interval for P - Pz at the given level of confidence. 13. x1 = 368, nj = 541, x2 = 421, n2 = 593, 90% confidence 14. X1 109, /1 = 475, x2 = 78, n2 = 325, 99% confidence 15. X. = 28. n. = 254, x2 = 36, n2 = 301, 95% confidence

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