Question 203877If the manager of a paint supply store wants estimate the mean amount of paint in a 1-gallon can to within +/- 0.004 gallon with 95% confidence and also assume that the standard deviation is 0.02 gallon, what sample size is needed? ----------- n = [z*s/E]^2 ------------ n = [1.96*0.02/0.004]^2 = n = 96.04 rounding up you get n = 97 (required sample size) ========================= Cheers, Stan H.