Refer to Exercise 8.86. Suppose you wish to estimate (µ1 - µ2) correct to within .2, with probability equal to .95. If you plan to use equal sample sizes, how large should n1 and n2 be?
Exercise 8.86
Independent random samples of n1 = 50 and n2 = 60 observations were selected from populations 1 and 2, respectively. The sample sizes and computed sample statistics are given in the table:

Find a 90% confidence interval for the difference in population means and interpret the interval.

Transcribed Image Text:

Population Sample Size Sample Mean Sample Standard Deviation 0.8 13 50 60 100.4 96