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Answer:
There is no statistical evidence to support the claim that the mean is elss than 74.
Step-by-step explanation:
Given that a paint-drying situation in which drying time for a test specimen is normally distributed with s = 6.
The hypotheses H0: µ = 74 and Ha: µ < 74
are to be tested using a random sample of n = 25 observations
a) Z =
ie. -1.417 std deviations to the left of mean.
b) p value = 0.078241
Since p > 0.01 , our alpha, accept H0
There is no statistical evidence to support the claim that the mean is elss than 74.