Question

the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.02 financial margin of error and use a confidence level of 99 % . Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. n (Round up to the nearest integer) b. Assume prior studies have shown that about 55% of full-time students eam bachelor's degrees in four years or less n= (Round up to the nearest integer.) c. Does the added knowledge in part b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) only slightly reduces the sample size O B. Yes, using the additional survey information from part i O C. No, using the additional survey information from part (b) does not change the sample size. O D. Yes, using the additional survey information from part (b) only sightly increases the sample size. ) dramatically reduces the sample size.

Answer 1

Margun erd Confidu ce level = 99 % 0 D 2 Zot/2 Pl-p M = 0D Margin e Rmake du d the Conjeyvatue põop8fi on evtimatk 50-/. 0.B5 2.S76 Con ideu ce Zalpf99 Ther fdre the yesuwveed sampk Size (1- o.5)2.6 \2 (16589-44) 0S (0s) 128.8) 4143.36 -4149 pE55 = 0.SS Ss) (1-0ST) (os) (45(28.8) .02 410S.8864 4106 The reguirdsaple Si 2e i4148 but aftin we enow the M^imatron our Sanple sizU Be lomes 4106 Jhouah there i a di Hu e betwem both sample sizus but iti nt much so, uan ^he additional survey nmation fron ent Cb) omty slighty neduces the sample S12e op hon (A î> -Hhe Cdhet one