Baldwin research firm wants to compute an interval estimate with 90% confidence for the mean time to complete an employment test. Assuming a population standard deviation of 3.5 hours, what is the required sample size if the error should be less than a half hour?  Round your answer to the nearest whole number.

Q: n = 47 p = 0.2 Find μ.     9.7     8.9     9.4

A: Hint:  For Binomial distribution mean = μ= np

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Q: 6. (L&K 4.24) In problem 5, test the null hypothesis Ho = 6 at significance level a = 0.05.

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Q: 2

A:

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Q: pls help ASAP

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