Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample [n] grocery stores and find that the average cost is X-bar = [xbar] cents with a standard deviation s = [s] cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the following hypotheses: Ho: µ s 75 and Ha: µ > 75. Which of the following hypothesis tests would be correct to use in this situation? Check all that apply. O A hypothesis test of proportions with a calculated Z statistic. O A hypothesis test of means with a calculated Z statistic. O A hypothesis test of means with a calculated T statistic.

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Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample [n] grocery stores and find that the average cost is X-bar = [xbar]
cents with a standard deviations = [s] cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the
following hypotheses: Ho: µ < 75 and Ha: u > 75. Which of the following hypothesis tests would be correct to use in this situation? Check all that
%3D
apply.
A hypothesis test of proportions with a calculated Z statistic.
A hypothesis test of means with a calculated Z statistic.
O A hypothesis test of means with a calculated T statistic.
Transcribed Image Text:Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample [n] grocery stores and find that the average cost is X-bar = [xbar] cents with a standard deviations = [s] cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the following hypotheses: Ho: µ < 75 and Ha: u > 75. Which of the following hypothesis tests would be correct to use in this situation? Check all that %3D apply. A hypothesis test of proportions with a calculated Z statistic. A hypothesis test of means with a calculated Z statistic. O A hypothesis test of means with a calculated T statistic.
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