Ahmadi, Inc. has been manufacturing small automobiles that have averaged 50 miles per gallon of gasoline in highway driv

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Ahmadi Inc Has Been Manufacturing Small Automobiles That Have Averaged 50 Miles Per Gallon Of Gasoline In Highway Driv 1 (58.35 KiB) Viewed 20 times

Ahmadi, Inc. has been manufacturing small automobiles that have averaged 50 miles per gallon of gasoline in highway driving. The company has developed a more efficient engine for its small cars and now advertises that its small cars average more than 50 miles per gallon in highway driving. An independent testing service road- tested 64 of the automobiles. The sample showed an average of 51.5 miles per gallon with a sample standard deviation of 4 miles per gallon. Complete all 6 of the following steps and use a .05 level of significance to see if the sample data provides enough evidence to support Ahmadi's new claim. Complete all parts of this problem in your Dropbox paper. Part 1: Set up the null and alternative hypotheses. Part 2: Specify a (the level of significance). Part 3: Calculate the test statistic. Part 4: Either find the critical value(s) of the rejection region(s) or calculate the p- value. Part 5: Make a decision about the null hypothesis. Part 6: Interpret your test results in context of the problem.