Population Mean Hypotheses Each of the following paragraphs calls for a statistical test about a population mean
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Question:
Population Mean Hypotheses
- Each of the following paragraphs calls for a statistical test about a population mean m.
- State the null hypothesis Ho nothing happened, there is no difference)
- State the alternative hypothesis Ha (something happened, there is a difference) in each case.
(a) The diameter of a spindle in a small motor is supposed to be 5 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of motors to determine whether the mean diameter has moved away from the target.
(b) Census Bureau data show that the mean household income in the area served by a hospital is $42,500 per year. A market research firm questions patients at the hospital. The researchers suspect the mean household income of patients is higher than that of the general population.
Related Book For
Business and Administrative Communication
ISBN: 978-0073403182
10th edition
Authors: Kitty o. locker, Donna s. kienzler
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