Math 200 Spring 17 Raynor Homework: Session 10: Chapter 8 Homework Score: 0 of 1
ID: 3216533 • Letter: M
Question
Math 200 Spring 17 Raynor Homework: Session 10: Chapter 8 Homework Score: 0 of 1 pt 18 of 19 (19 complete) HW score: 94.74%, 18 of 19 p 8.2.19 auesson Help why this to a study conducted by an organization, the proportion who were in2006 was 010. is that Americans who are has decreased Select the correct choice below and r necessary. fill in the answer box to complete your choice O A. This is not necessary evidence that the proportion of Americans who are afraid fy has decreased below 0.10 because the sample size nis more than 5% of the populaton to B. This is not necessarily evidence that the proportion of Americans who are afraid to fy has d below 0.10 because the value of np1- p is less than 10. *c. This is not necessarily evidence that the proportion of Americans who are afraid to fy has decreased below o 10 because the probabilty of obtaining a value equal to or more extreme than the sample is 0,1147, which is not unusual (Round to four decimal places as needed.) *D This is not necessary evidence that he proporton ofAmericans who are afad of has deceased belowo 10 because the sample proposon I is very close to 0. 10 (Type an integer or a decimal) Question is complete. Tap on the red indicators to see incorrect answers. All parts showingExplanation / Answer
Below are the null and alternate hypothesis
H0: p >= 0.1
H1: p < 0.1
pcap = 117/1300 = 0.09
std. dev. = sqrt(0.1*0.9/1300) = 0.0083
test statistics = (0.9-0.1)/0.0083 = -1.2019
p-value i.e. P(X<-1.2019) = 0.1147
If we consider the significance level of 0.05, we fail to reject the null hypothesis. This means there is not significant evidence that the proportion of Americans who are afraid to fly has decreased below 0.1.
Hence option (C)