Question

A simple random sample of size nis drawn. The sample mean, X, is found to be 18.3, and the sample standard deviation, s, is found to be 42. Click the loon to view the table of areas under the-distribution (a) Construct a 95% confidence interval about it the sample size, n, is 35. Lower bound: : Upper bound: (Use ascending order. Round to two decimal places as needed.) (6) Construct a 95% confidence interval about if the sample size, n, is 61. Lower bound: ): Upper bound: (Use ascending ordet. Round to two decimal places as needed.) How does increasing the sample size affect the margin of error, E? O A. The margin oferte does not change OB. The margin terror increases OC. The margin of error decreases (c) Construct a 99% confidence interval about the samples is 35 Lower bound Upper bound cum canding order Round to two decimal places as needed.) Compare the results to those obtained in part alHow does increasing the level of confidence affect the size of the margin of error, E? Click to it your answers questi vey of 1006 MacBook Pro so S 4 2 & 3 Ол ? 6 7 8 9 tab W E R. Т. А caps lock S D F G Н. J K N shift C V B N М. fo control option command

Answer 1

Question is answered below.

Page No. x = 18.3 s = 4.2 (as 957. M confidence interval about n-35 s t(0.025, n-). In 18.3 + $10-028, 54). Ha 135 18.3 + 2.032 X 4.2 35 18. 3 I 1.4426 18.3 & 1.44 6.86, 19.74 (16-86, ME=1.44 Lower bound 116.86 upper brend 19.74 about 95% confidence interval for et, n=61 t(0.025,60) = 2.000 ž to.oasin). I 18.3 2.000 X 4.2 J61 Sn

Pago No. 18.37 1.08 (17:22,19-38 Lower seund 77-22 upper bound 119.38 M.E= (1-08 Increasing the sample sigle. The margean of essas decreases optan OG W 99 % c. I abent M. In = 35. x = 110.005, n.) a J35 18-3 f 005, 34) * 4.2 18.3 2.128 X 4.2 535 18.3 I 1.94 ME=[1.94 Lower bound (16-36] upper berend Increasing level of confidence. affect the sta of ME. Sophear B Margin of essor increases The sample il must come from a popul. that is normally durisuted, and the sample Sin musta be large. 20.24 fol) Copten A