In a survey on supernatural experiences, 722 of 4013 adult Americans surveyed reported that they had seen
Question:
a. What assumption must be made in order for it to be appropriate to use the formula of this section to construct a confidence interval to estimate the proportion of all adult Americans who have seen or been with a ghost?
b. Construct and interpret a 90% confidence interval for the proportion of all adult Americans who have seen or been with a ghost.
c. Would a 99% confidence interval be narrower or wider than the interval computed in Part (b)? Justify your answer.
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Related Book For
Statistics The Exploration & Analysis Of Data
ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore
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