the dimensions of an in-ground swimming pool are 16 feet by 40 feet. A landscaper has drawn a scale model of the pool on a large piece of paper. If the longest side of her drawing is 12.5 inches, how long is the other side of the drawing?

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.