Question

A new model compact car is being tested for gasoline consumption. A random sample of 40 such cars were tested at the sea level and found to get an average of 36.2 m/g (miles
per gallon) with a sample standard deviation of 4.8 m/g. Another random sample of 35 such cars were tested one mile above the sea level in Denver, CO., and found to get an average of 31.5 m/g with a sample standard deviation of 5.5 m/g. At the 0.01 level of significance, test the claim that the new model compact cars burn more gas (get less m/g on average) at one mile above sea level.

Sample 1 Sample 2
Claim:
1- H0:
H1:
2- Test Statistic:

3- Critical Region/Critical Value:

4- Decision about H0

Answer 1