Just answer part H the rest are correct Please just answer part c and d the rest
ID: 3223190 • Letter: J
Question
Just answer part H the rest are correctPlease just answer part c and d the rest are correct lUlllUWork: Section 7.4 Homework Score: 0.64 of 1 pt Lab Home (25) 7.4.56 10 of 16 16 complete) v conten HW Score: 85.3 Apoll showed that 38% of randomly surveyed adults in a certain country said their country benefits from having a rich class. Complete parts (a) f Find a 95% confidence interval, using the numbers from part (e). The 95% confidence interval is 36.2%, 39.8%) (Round to one decimal place as needed.) g. What is the width of the interval you found in part (f? The width of the interval is 3.6 lat (Round to one decimal place as needed.) h. When the sample size is by 9 is the width of the interval divided by 9? not, what is it divided by? selectthe correct below the answer box to complete your choice. O A. Yes, when the sample size is multiplied by 9, the width of the interval is divided by 9. O B. No, when the sample size is multiplied by 9, the width of the interval is divided by (Round to the nearest integer as needed.) Click to select and enter your answer(s) and then click Check Answer All parts showing Clear All v Question 9 (1/1) Question 10 (0.64/1) Question 13 (1/1) Question 14 (1/1) Question 15
Explanation / Answer
c) n = 70
passing marks = 0.56 *70
this is binomial distribution , with n= 70 , p= 0.5
P(X>=0.56*70) = 0.201481 {exact}
by normal approxiamtion
P(X>0.56*70)
P(Z> (0.56*70-70*0.5)/sqrt(70*0.5*0.5))=P(Z>1) =0.1587
d) if 4 options
p = 0.25
lower
then required probability wold be lower as probability of getting a question has decreased.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.