A Newsweek article titled America the Ignorant (www.newsweek.com) described a Gallup poll that asked adult Americans if
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a. Describe the shape, center, and spread of the sampling distribution of for random samples of size 800 if the null hypothesis H0: p = 0.10 is true.
b. Would you be surprised to observe a sample proportion of = 0.16 for a sample of size 800 if the null hypothesis H0: p = 0.10 were true? Explain why or why not.
c. Would you be surprised to observe a sample proportion of = 0.12 for a sample of size 800 if the null hypothesis H0: p = 0.10 were true? Explain why or why not.
d. The actual sample proportion observed in the study was = 0.21. Based on this sample proportion, is there convincing evidence that more than 10% of adult Americans believe in witches and warlocks, or is the sample proportion consistent with what you would expect to see when the null hypothesis is true? Support your answer with a probability calculation. Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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