6 A car company claims that they increased the MPGs for its

Last updated: 5/23/2023

6 A car company claims that they increased the MPGs for its cars Below are MPGs in 2015 and then in 2020 of some of their models 33 25 30 36 25 32 2015 2020 23 25 27 29 24 25 At 0 05 can we claim that the mean difference is less than zero Does the manufacturer have a valid claim Test using a a hypothesis test b a confidence interval