Five snails are having a race. The snail's speeds are given in the table. Which two snails are going the same rate of speed? SNAIL RACE
Snail Name Speed
Alice 33 feet / 15 min
Bert 59 feet / 14 min
Carl
40 feet / 8 min
Dennis 55 feet/ 10 min
Eva 55 feet / 11 min
O A Carl and Eva
O B. Bert and Eva
O C. Bert and Dennis
O
D. Carl and Dennis

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.