Sub: Statistics Topic: Testing
Interpret the decision regarding the null hypothesis.
ClassOf1 provides expert guidance to College, Graduate, and High school students on homework and assignment problems in
Math, Sciences, Finance, Marketing, Statistics, Economics, Engineering, and many other subjects.
Information from AAA indicates that the mean age of passenger cars in the US is 8.4 years. A sample of
40 cars in the student lots at the local university showed the mean age to be 9.2 years. The standard
deviation of this sample was 2.8 years. At the .01 significance level can we conclude the mean age is
more than 8.4 years for the cars of university students?
a. Compute the val