Question

C (0.331, 0.400) 21) In the months leading up to an election, news organizations conduct many surveys to help predict the results of the election. Often news organizations will increase the sample size in the last few weeks before the election. Which of the following is the primary reason they increase the sample size? Alarger sample size allows more people to give their input. . Alarger sample size means the sampling method isn't as important. C A larger sample size gives a higher confidence level. .Alarger sample size gives a narrower confidence interval. 22) The administration at Pierce College conducted a survey to determine the proportion of students who ride a bike to campus. oft 125 students surveyed 6 ride a bike to campus. he Which of the following is a reason the administration should not calculate a confidence interval to estimate the proportion of all students who ride a bike to campus? Check all that apply.

Answer 1

TOPIC:Discussion about the confidence interval.

2.1 Here, the mews on ganiations ane interusted to get an intenval etimate tha populatien avenage to predlet th the the elestin Now, ;d the samkle see (m) increases , than, tha margin ernon (E) decreases. As E is inverset propontionat to n' Now, whan tha margin f evon daeraasex, than, the width dacreases tha conidane intorwal becomes So, the correct tion is A anen somple size gives a nowawor comHdena intersel 2,> Hety n= No. 엠 students surveyed 125. No.g| ctudents who mile abike ang, to campus 6 sample proro hon (f) -125 20.048 w, np = 125 xo.ot8 (く10). 6 N o Auo, we dow't new the exact sampt mmethod. lie whethee it is a mandom Sample one mot

can use Normnat approximation, but hergrpcto. So, the easons are The sampla needs to be nandam bot we lon know y it . n (p-halr) AD γ0t greater than 0 , Arvo p) = 0.55 ; the corveel explanation o the manain evron (E) is within 5t y.the ampla samble Note that, we can't be (00 Y. thak pebulation propontions within S.t Y the Sample ropondon- of 55y, since while caloulating the margin a emon, ak inct we. need to speeta ant towel signidicareeCK) , and don thar this the T eon (R), we can't be oo y. swra about the coneliusion