I need #7 answered but I attached #4 for reference. 4a.) t a/2=2.16 CI= (48.64,69.52) 4b.) X 2/L=5.892 X 2/R=22.36 CI=(13.81,26.89)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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I need #7 answered but I attached #4 for reference. 4a.) t a/2=2.16 CI= (48.64,69.52)
4b.) X 2/L=5.892
X 2/R=22.36 CI=(13.81,26.89)

7.) Use the information in #4. At a = 0.01, test the claim that the standard deviation is
%3D
10.
Transcribed Image Text:7.) Use the information in #4. At a = 0.01, test the claim that the standard deviation is %3D 10.
4.) The following are wait times (in minutes) at a certain DMV:
88 75
25
76 56
45
35
66
45
77 65
66
43
65
a.) Construct a 95% confidence interval for the mean wait time at this DMV. Is it
reasonable to say that the wait time is 30 min?
b.) Construct a 90% confidence interval for the standard deviation of wait times
Transcribed Image Text:4.) The following are wait times (in minutes) at a certain DMV: 88 75 25 76 56 45 35 66 45 77 65 66 43 65 a.) Construct a 95% confidence interval for the mean wait time at this DMV. Is it reasonable to say that the wait time is 30 min? b.) Construct a 90% confidence interval for the standard deviation of wait times
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