# Question

Explain what a P-value is. What is the criterion for rejecting the null hypothesis using the P-value approach?

## Answer to relevant Questions

Suppose we are testing the hypothesis H0: p = 0.3 versus H1: p > 0.3 and we ﬁnd the P-value to be 0.23. Explain what this means. Would you reject the null hypothesis? Why? To test H0: µ = 50 versus H1: µ < 50, a simple random sample of size n = 24 is obtained from a population that is known to be normally distributed. (a) If x̄ = 47.1 and s = 10.3, compute the test statistic. (b) If the ...To test H0: µ = 45 versus H1: µ ≠ 45, a simple random sample of size n = 40 is obtained. (a) Does the population have to be normally distributed to test this hypothesis by using the methods presented in this section? ...According to the American Time Use Survey, the typical American spends 154.8 minutes (2.58 hours) per day watching television. Do Internet users spend less time each day watching television? A survey of 50 Internet users ...Test the hypotheses in Problem 23 by constructing a 99% conﬁdence interval.Post your question

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