You are the new manager of Amy's ice-cream! They give you the data from the last problem that for every 14 cones sold 6 bowls of ice cream are sold.

They ask you to order ice cream for the weekend. Last weekend they had a

total of 800 customers. If they can expect the same number of customers

this weekend, how many cones and bowls do you need to order? Select all

that apply.

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.