From previous experience, the owner of an apple orchard knows that the mean weight of gala apples is 140 grams. This year there has been more precipitation than usual and the owner believes the weights of the apples will be heavier than usual. The owner takes a random sample of 30 apples and records their weights. What is the appropriate inference procedure?
Answer
A
two-sample t -test for mu sub c minus mu sub p
B
one-sample t -test for mu sub d i f f
C
one-sample t -test for μ
D
one-sample z - test for p
Explanation
The owner has one random sample of 30 apple weights and wants to compare its mean with the known historical mean of 140 grams. Because the population standard deviation is not given and the outcome is a quantitative measurement, the appropriate procedure is a one-sample t-test for μ. The alternative hypothesis would be that μ is greater than 140 grams.
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