Question

Are you likely to purchase an item promoted by a celebrey on a social media site? According to a survey. 27% of soal media users have made such a purchase. Compte parts a through d below a Suppose that the survey had a sample size oe n.800. Construct a 90% cofdence intnal estrate fr te poplan pre ponon or social media aan tahan purchased annen pr ted by a celebrity on a social media site. 02442 0 2958 Type an integer or a decimal Round to four decimal places as needed) b. Based on (a), can you claim that more than a quarter of all social media users have purchased an item promoted by a celebrity on a social media site? O A Yes, with 90% oonfidence because the sample proportion is geater than a quarter, and i tals within the Ints of he confdence iterval estimate No, because a 90% confidence interval is not indicative of a guarantee. A 99 9% confidence interval would be needed to make such a claim. B C. No, because the confidence interval contains proportion values that are less than 025 0 D Yes, with 90% con idence because al the values contained in the conddence interval are geater than 025. c. Repeat parts (a) and (b), assuming that the survey had a sample size of n-11.000. Construct a 90% confidence interval estimate for the population proportion of social media users of social media users that have purchased an item promoted by a celebrity on a social media site Type an integer or a decimal. Round to four decimal places as needed )

Answer 1

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90'ı c丁 022 L PL 0,2958 코 arre ven 0.97 ± 0.00(1