Medicare Would Like to Test the Hypothesis That the Average $$z \bar { x }$$

question 11

Multiple Choice

Medicare would like to test the hypothesis that the average monthly rate for one-bedroom assisted-living facility is equal to $3,300. A random sample of 12 assisted-living facilities had an average rate of $3,690 per month. The standard deviation for this sample was $530. Medicare would like to set ? = 0.05. The test statistic for this hypothesis test would be .

• A)\[z \bar { x }\] = - 1.37
• B)\[t \bar { x }\] = 2.55
• C)\[z \bar { x }\] = 1.98
• D)\[t \bar { x }\]= - 2.16

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