MATH 324

Task: Exercise 1: A company with a large fleet of cars wants to study the gasoline usage. They check the gasoline usage for 50 company trips chosen at random, finding a mean of 25.02 mpg. Based on the past experience, they believe the standard deviation of the general gasoline usage is 4.83 mpg. (a) Which kind of confidence intervals is appropriate to use here, z-interval or t-interval? (b) Please use R to find the critical value they need when c

22 Other / Other San Francisco State University / MATH 324 18 Nov 2020