Question

In: Statistics and Probability

Suppose that a certain brand of calculators claims to have a 7% defect rate. a. If...

Suppose that a certain brand of calculators claims to have a 7% defect rate.
a. If we select 6 calculators at random, what is the probability that two or fewer of them are defective? Round your answer to three decimal places.

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b. A researcher believes that the defect rate is actually higher than what the company claims. She selects 500 calculators and finds that 41 of them are defective. At a significance level of 10%, does the researcher have evidence to support her claim? Perform the appropriate hypothesis test. Round your sample statistic to three decimal places.
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