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Confidence interval for the true population proportion

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A. In a sample of 580 adults, 377 had children. Construct a 95% confidence interval for the true population proportion of adults with children. Give your answers as decimals, to three places

 < p < 

B. You measure 49 backpacks' weights, and find they have a mean weight of 69 ounces. Assume the population standard deviation is 12.6 ounces. Based on this, construct a 99% confidence interval for the true population mean backpack weight. Give your answers as decimals, to two places

____ +/- _______ ounces

C. What is the order of steps below:

a. reject or fail to reject null b. calculate test statistic c. identify test type then relevant statistic d. write null and alternative hypotheses e. write conclusion f. calculate p-value g. compare p-value to alpha

D. The p-value for a hypothesis test turns out to be 0.02265. At a 8% level of significance, what is the proper decision?

Reject H0

Fail to reject H0

E. If your null and alternative hypothesis are: H0:μ=27H0:μ=27  H1:μ<27H1:μ<27 Then the test is: Left/Right/two tailed

Reference no: EM131966747

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