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Question 11 (1 point) Consider the sample 33, 51, 61, 40, 62, 54, 58, 47, 32, 26 from a normal population with population mean μ and population variance o2. Find the 95% confidence interval for u. a) 46.4±10.54 Ob) 46.4±9.28 O c) 46.4±10.21 d) 46.4±9.14 e) 46.4±11.12

Question 12 (1 point) Consider the sample 34, 12, 49, 53, 42, 61, 40, 56 from a normal population with population mean μ and population variance o2. Find the 95% confidence interval for H. a) 43.375± 12.953 b) 43.375± 10.251 c) 43.375± 6.754 d) 43.375± 8.601 e) 43.375± 11.295

Question 13 (1 point) Suppose X₁,...,x is a sample of successes and failures from a Bernoulli population with probability of success p. Let [x=280 with n=400. Then a 95% confidence interval for p is: a) .7 ± .04491 b) .7 ±.08497 c) .7 ± .02491 d) .7 ±.03391 e) .7 ±.04691

Question 14 (1 point) Consider the sample 81, 89, 72, 85, 90, 75, 70, 71, 76, 77, 78, 79 from a normal population with population mean μ and population variance o2. Find the 95% confidence interval for u. a) 78.58±3.42 b) 78.58±5.12 c) 78.58±5.18 d) 78.58±4.21 e) 78.58±6.68

Question 15 (1 point) Consider the sample 52,55,79, 69, 72, 63, 70, 73, 66, 70,86 from a normal population with population mean μ and population variance o². Find the 95% confidence interval for u. Please choose the best answer. a) 68.64±4.53 b) 68.64±8.53 68.64±6.53 d) 68.64±1.53 e) 68.64±3.53