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Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? Partial critical value table This 90% confidence level requires 18 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? Level of Confidence, Critical Value, za/2 (1-a) • 100% Area in Each Tail, 7 This 90% confidence level requires subjects. (Round up to the nearest subject.) 90% 0.05 0.025 0.005 1.645 1.96 95% 99% 2.575 Print Done

Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? Partial critical value table This 90% confidence level requires 18 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? Level of Confidence, Critical Value, za/2 (1-a) • 100% Area in Each Tail, 7 This 90% confidence level requires subjects. (Round up to the nearest subject.) 90% 0.05 0.025 0.005 1.645 1.96 95% 99% 2.575 Print Done

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Question #8 Part B

People were polled on how many books they read the previous year. Initial survey results indicate that s = 15.4 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. ..... (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? Partial critical value table This 90% confidence level requires 18 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? Level of Confidence, Critical Value, Za/2 (1- a) • 100% Area in Each Tail, 2 This 90% confidence level requires subjects. (Round up to the nearest subject.) 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575 Print Done
Transcribed Image Text:People were polled on how many books they read the previous year. Initial survey results indicate that s = 15.4 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. ..... (a) How many subjects are needed to estimate the mean number of books read the previous year within six books with 90% confidence? Partial critical value table This 90% confidence level requires 18 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within three books with 90% confidence? Level of Confidence, Critical Value, Za/2 (1- a) • 100% Area in Each Tail, 2 This 90% confidence level requires subjects. (Round up to the nearest subject.) 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575 Print Done
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