QUESTION 7 The paint drying times are normally distributed with the mean 120 minutes and standard deviation 15 minutes. If a sample of 40 paint drying times is selected, which of the following is expected total drying times? 24 minutes 120 minutes 2400 minutes 4800 minutes QUESTION 8 The paint drying times are normally distributed with the mean 120 minutes and standard deviation 15 minutes. If a sample of 36 paint drying times is selected, which of the following is the probability of average paint drying time being less than 125 minutes? 0.9772 0.6306 0.0008 no enough information
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Step 1: The expected total drying time for a sample of 40 paint drying times can be calculated by multiplying the mean drying time by the sample size. Show more…
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