Previous Problem List Next 2 Points A Find The Size Of Each Of Two Samples Assume That They Are Of Equal Size Needed 1 (26.12 KiB) Viewed 24 times
Previous Problem List Next 2 Points A Find The Size Of Each Of Two Samples Assume That They Are Of Equal Size Needed 2 (19.85 KiB) Viewed 24 times
Previous Problem List Next 2 points)(a) Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume the "worst case scenario for the value of both sample proportions. We want a 99% confidence level and for the error to be smaller than 0.07. Answer: Again find the sample size required, as in part (2), but with the knowledge that a similar student last year found that the proportion of boys afraid of spiders is 0.87 and the proportion of girls afraid of spiders was 0.9. Answer: Note: You can earn partial credit on this problem Preview My Answers Submit Answers You have attempted this problem times. You have unlimited attempts remaining Email Instructor
12 points) Two random samples of students at a school are taken. Both groups are asked if they wish to continue their education by going to college. A summary of the sample sizes and proportions of each group answering yes" are given below: UVA (Pop. 1): * = 99, Di = 0.721 UNC (Pop. 2): 7 = 91, p = 0.624 Find a 96% confidence interval for the difference P-P of the proportions. Express your answer as an interval in the form (a, b). Confidence interval Preview My Armware Submit Answers You have attempted this problem o times You have unlimited attempts remaining Emainstructor
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