Question

please answer #5

5. Ask Your In a survey on I experiences, 718 of 4003 adult reported that they had seen or been with a ghost (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 propartion of all adult Americans who have seen or been with a ghost? We need to assume that the 718 people are the only Americans who had seen or been with a ghost. We need to assume that the 4003 people formed a random sample of adult Americans. O We need to assume that there are only 718 adult Americans We need to assume that the 4003 people were surveyed at a supernatural convention. b) Construct a 90% confidence interval for the proportion of all adult Americans who have seen or been with a ghost. (Round your answers to three decimal pl es Interpret the interval. we are 90% confident that the proportion of all adult Americans who havdeen or been with ,ghost s minim nes nternat we are 90% confident that the proportion who have seen or been with a ghost is within this interval we are confident that 90% of the proportion of all adut Americans-ho nave leen or bren with, rest s rents neat ^ ○ we are confident that the proportion of all adult Americans who have seen or been with a ghost is within this interval 90% of the time (c) would a 99% confidence interval be narrower or wider than the interval computed in part (b), narrower wider You may need to use the appropriate table in Appendix A to answer this question.

Answer 1

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