Explore BrainMass

Explore BrainMass

    Null and Alternate Hypothesis : key information

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    6. The manufacturer of a particular all-season tire claims that the tires last for 22,000 miles. After purchasing the tires you discover that yours did not last the full 22,000 miles. Suppose that a sample of 100 tires made by that manufactures lasted on average 21,819 miles with a sample standard deviation of 1,295 miles. Is there sufficient evidence to refute the manufacturer's claim that the tires last 22,000 miles? Let α = 0.05. Assume that the population standard deviation is σ= 1300.

    State the null hypothesis.

    State the alternate hypothesis.

    What is the appropriate rejection region?

    Compute the test statistic.

    What is the final conclusion? Explain.
    (Question also in attachment below)

    © BrainMass Inc. brainmass.com October 1, 2020, 5:01 pm ad1c9bdddf