Question

A survey was conducted that asked 1002 people how many books they had road in the past you to indicated that to books and a 166 books Contro% confidence vad for the mean number of books people read. Interpret the interval Click the icon to view the table of critical values Construct a 90% confidence interval for the mean number of books people read and interpret the rest Selected choice below and in the answers to complete your choice (Use ascending ordet Round to two decimal places as needed) OA. There is a 90% probability that the true mean number of books read is between and OB. If repeated samples we taken. 90% of them will have a sample mean before OC. There is 90% confidence that the population mean number of books read is between

Answer 1

sample size =n=1002

sample mean=m=10.7

sample SD=S=16.6

sample size is large so we will use Z test

now 90% confidence interval is given by

S 16.6 m = 20.05 * 10.7 +1.645 * 10.7 + 0.86 n 1002

Hence interval is (9.84,11.56)

90% confidence interval mean we are 90% confident that true population mean lies in this interval hence

option (C) is correct with 9.84 and 11.56