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    Hypothesis test regarding a standard deviation

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    The annual temperature of a city is obtained by finding the mean of the mean temperatures on the 15th day of each month. The standard deviation of the annual temperatures of the city of a period of 100 years was 16 degrees Fahrenheit. During the last 15 years a standard deviation of annual temperatures was computed as 10 degrees Fahrenheit. Test the hypothesis that the temperatures in the city have become less variable than in the past, using a significance level of (a) 0.05 (b) 0.01.

    © BrainMass Inc. brainmass.com December 24, 2021, 5:07 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/hypothesis-test-regarding-a-standard-deviation-29991

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

    © BrainMass Inc. brainmass.com December 24, 2021, 5:07 pm ad1c9bdddf>
    https://brainmass.com/statistics/hypothesis-testing/hypothesis-test-regarding-a-standard-deviation-29991

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