Answer to Question #347573 in Statistics and Probability for KLTino

Question

Determine the given and compute the test statistic of the problem below using Central Limit Theorem, and construct the rejection region for each.

A company claimed that their N95 face mask has a mean filtration efficiency rate of 95%. A group of student researcher wanted to verify this claim. They bought and tested 40 of their N95 face masks. They found out that the average filtration efficiency rate of these face mask was 90% with astandard deviationof 4%. Test the claim at 5% level of significance and assume that the population is approximately normally distributed.

Answer 1

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