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A dietician investigated whether apples washed in hot water or in cold water turned brown at different rates when exposed to air. She took 13 random apples and cut each in half. She washed one half of each apple in hot water and the other half in cold water, and then put both halves out in a tray. Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
Hot Water
Cold Water
Sample mean
5.50
4.85
Sample variance
2.60
2.00
a. No, because the test value -1.09 is inside the range (-3.055, 3.055).
b. No, because the test value -0.79 is inside the range (-3.055, 3.055).
c. Yes, because the test value -0.79 is inside the range (-3.012, 3.012).
d. Yes, because the test value -1.09 is outside the range (-3.012, 3.012).
What type of error would result in that case? Respond to at least two of your classmate's postings.
What is the probability of getting a number less than 5 on both?
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Find the test statistic P-value, and critical value, and state the final conclusion.
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