Construct a 99 % confidence interval for the population standard deviation a at Bank A. Omin
Construct a 99 % confidence interval for the population standard deviation a at Bank A. Omin
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
100%
Transcribed Image Text:The values listed below are waiting times (in minutes) of customers at two different banks. At Bank A, customers enter a single waiting line that feeds three teller windows. At Bank B, customers may enter any one of three different lines that
have formed at three teller windows. Answer the following questions.
Bank A
6.4
6.6
6.7
6.8
7.1
6.7
7.3
7.6
7.8
7.9
7.9
7.9
Bank B
4.1
5.4
5.9
6.2
7.8
8.6
9.3
10.0
1= Click the icon to view the table of Chi-Square critical values.
Construct a 99% confidence interval for the population standard deviation a at Bank A.
Omin < aBank A < min
(Round to two decimal places as needed.)
Transcribed Image Text:Area to the right of the critical value
listed beld
ed at three
fferent lin
7.9
10.0
Chi-Square (X2) Distribution
he icon to
Area to the Right of the Critical Value
Degrees of
Freedom
99% con
Degrees of
0.995
0.99
0.975
0.95
0.90
0.10
0.05
0.025
0.01
0.005
Freedom
Bank A
vo decima
0.001
0.004
0.016
2.706
3.841
5.024
6.635
7.879
1
0.010
0.020
0.051
0.103
0.211
4.605
5.991
7.378
9.210
10.597
0.072
0.115
0.216
0.352
0.584
6.251
7.815
9.348
11.345
12.838
3
4.
0.207
0.297
0.484
0.711
1.064
7.779
9.488
11.143
13.277
14.860
4.
0.412
0.554
0.831
1.145
1.610
9.236
11.071
12.833
15.086
16.750
6
0.676
0.872
1.237
1.635
2.204
10.645
12.592
14.449
16.812
18.548
6.
7.
0.989
1.239
1.690
2.167
2.833
12.017
14.067
16.013
18.475
20.278
7
8.
1.344
1.646
2.180
2.733
3.490
13.362
15.507
17.535
20.090
21.955
6.
1.735
2.088
2.700
3.325
4.168
14.684
16.919
19.023
21.666
23.589
9.
10
2.156
2.558
3.247
3.940
4.865
15.987
18.307
20.483
23.209
25.188
10
11
2.603
3.053
3.816
4.575
5.578
17.275
19.675
21.920
24.725
26.757
11
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