Mathematics, 05.05.2020 17:30 expeditionofsin
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug company will market the new anesthetic; otherwise, they will continue to produce the older one. A sample of size 36 results in a sample mean of 7.1. A hypothesis test will be done at the 10% level of significance to help make the decision.
Answers: 3
we see that 
so we can conclude that we have enough evidence to reject the null hypothesis, and the true mean is significantly lower than 7.4 minutes at 10% of significance
represent the sample mean 
represent the population standard deviation 
sample size
represent the value that we want to test 
represent the p value for the test (variable of interest)
(1)
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A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic...
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