We have a huge amount of data showing that the mean acceleration time (0 to 60 miles
Fantastic news! We've Found the answer you've been seeking!
Question:
We have a huge amount of data showing that the mean acceleration time (0 to 60 miles per hour) is 10.2 seconds when using regular unleaded gasoline. Now suppose that we make 41 such tests using premium unleaded gasoline because we want to find out whether premium unleaded gasoline gives us a reduction (improvement) in mean acceleration time. The sample mean acceleration for this group turns out to be 9.7 seconds with sample standard deviation of 2.1 seconds.
Related Book For
Elementary Statistics Picturing the World
ISBN: 978-0134683416
7th edition
Authors: Ron Larson, Betsy Farber
Posted Date: