main

prev        

Statement of a problem № m403

        next    

Dylan Jones kept careful records of the fuel efficiency of his new car. After the first nine times he filled up the tank, he found the mean was 23.4 miles per gallon (mpg) with a sample standard deviation of 0.9 mpg. a. Compute the 95% confidence interval for his mpg. b. How many times should he fill his gas tank to obtain a margin of error below 0.1 mpg?




New search. (Also 1294 free access solutions)

Online calculators