The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s = 10.129 weeks. Construct and interpret a 90% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl. 53 29 45 36 38 25 48 39 54 26 39 28 E Click the icon to view the table of critical values of the chi-square distribution. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) O A. There is 90% confidence that the population standard deviation is between and O B. There is a 90% probability that the true population standard deviation is between and O C. If repeated samples are taken, 90% of them will have the sample standard deviation between and.

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Author:Amos Gilat
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Chapter1: Starting With Matlab
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The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s = 10.129 weeks.
Construct and interpret a 90% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl.
53
29
45
36
38
25
48
39
54
26
39
28
Click the icon to view the table of critical values of the chi-square distribution.
Select the correct choice below and fill in the answer boxes to complete your choice.
(Use ascending order. Round to three decimal places as needed.)
O A. There is 90% confidence that the population standard deviation is between
and
B. There is a 90% probability that the true population standard deviation is between
and
O C. If repeated samples are taken, 90% of them will have the sample standard deviation between
and
Transcribed Image Text:The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s = 10.129 weeks. Construct and interpret a 90% confidence interval for the population standard deviation of the age (in weeks) at which babies first crawl. 53 29 45 36 38 25 48 39 54 26 39 28 Click the icon to view the table of critical values of the chi-square distribution. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) O A. There is 90% confidence that the population standard deviation is between and B. There is a 90% probability that the true population standard deviation is between and O C. If repeated samples are taken, 90% of them will have the sample standard deviation between and
Chi-Square Distribution Critical Values Table
Chi-Square (x) Distribution
Areato the Right of Critical Vahue
Degrees of
Freedom
0.995
0.99
0975
095
0.90
010
0.05
0.025
0.01
0.005
2.706
4.605
6.251
1
0.001
0.004
0.016
3.841
5.024
6.635
7879
0.010
0.072
0.061
0.216
0.484
0.103
0.352
0.711
1.145
5991
7815
0020
0.211
7.378
9.210
10.597
0.584
1.064
1.610
3
0.115
9.348
11.345
12.838
14.860
16.750
4
0.207
0297
7.779
9.488
11.143
12.833
13.277
5
0.412
0554
0.831
9.236
11.070
15.086
0.676
0.989
1.344
1.735
2.156
1.635
2.167
16.812
18.475
10.645
12592
14.067
15.507
16.919
18.548
0.872
1.239
1.646
1.237
1.690
2.204
14.449
16.013
17535
2.833
12.017
20278
13.362
14.684
15.987
21.955
23589
25188
2.180
2.733
3.325
3.490
20.090
4.168
4.865
2.088
2.700
19.023
21.666
10
2.558
3.247
3.940
18.307
20.483
23209
3.063
3.571
4.107
4.660
5.229
5.578
6.304
7042
19.675
21.026
22.362
23.685
24.996
2.603
3.816
4.575
5.226
5.892
6.571
7261
17275
18.549
19.812
21.064
22.307
24.725
26 217
27688
29.141
30578
26.757
28.300
29.819
11
21.920
12
13
3.074
3565
4.075
4.601
4.404
5.009
5.629
6.262
23.337
24.736
26.119
14
31.319
32.801
7.790
15
8.547
27.488
6.908
7564
5142
5.697
6.265
6.844
7434
5.812
6.408
7015
7633
8.260
7962
8.672
23.542
24.769
25.989
26.296
27587
28.869
28.845
34.267
35.718
37156
38.582
16
9.312
32.000
17
10.085
30.191
31.526
32.852
33.409
10.865
11.651
12.443
34.805
36.191
37566
18
8.231
9.390
19
8.907
10.117
27.204
30.144
20
9.591
10.851
28.412
31.410
34.170
39.997
11.591
29.615
32.671
33.924
35.172
36.415
37652
35.479
36.781
38.076
39.364
40.646
21
8.034
10.283
13.240
38.932
8.897
9.542
10.196
10.856
11.524
41.401
8.643
9.260
9.886
10.520
10.982
11.689
12.338
14.041
30.813
40.289
42.796
13.091
13.848
14.848
15.659
16.473
32.007
41638
44.181
45.559
46.928
12.401
33.196
42.980
25
13.120
14.611
34.382
44.314
15.379
16.151
16.928
11160
13.844
14.573
15.308
16.047
16.791
17.292
18.114
18.939
నర3
36.741
37.916
38885
41.923
43.195
44.461
45.722
46.979
45.642
46.963
26
12.198
48.290
49645
50993
52.336
53672
27
11808
12879
13.565
14.256
14.953
40.113
12.461
41.337
42557
43.773
28
48.278
29
30
19.768
20.599
49.588
50.892
13.121
17.708
18.493
39.087
13.787
40.256
26.509
34 764
29.051
37689
51.805
63167
22.164
55.758
67505
59.342
71 420
63.691
76154
66.766
79 490
40
20.707
24.433
32.357
50
27991
29 07
Transcribed Image Text:Chi-Square Distribution Critical Values Table Chi-Square (x) Distribution Areato the Right of Critical Vahue Degrees of Freedom 0.995 0.99 0975 095 0.90 010 0.05 0.025 0.01 0.005 2.706 4.605 6.251 1 0.001 0.004 0.016 3.841 5.024 6.635 7879 0.010 0.072 0.061 0.216 0.484 0.103 0.352 0.711 1.145 5991 7815 0020 0.211 7.378 9.210 10.597 0.584 1.064 1.610 3 0.115 9.348 11.345 12.838 14.860 16.750 4 0.207 0297 7.779 9.488 11.143 12.833 13.277 5 0.412 0554 0.831 9.236 11.070 15.086 0.676 0.989 1.344 1.735 2.156 1.635 2.167 16.812 18.475 10.645 12592 14.067 15.507 16.919 18.548 0.872 1.239 1.646 1.237 1.690 2.204 14.449 16.013 17535 2.833 12.017 20278 13.362 14.684 15.987 21.955 23589 25188 2.180 2.733 3.325 3.490 20.090 4.168 4.865 2.088 2.700 19.023 21.666 10 2.558 3.247 3.940 18.307 20.483 23209 3.063 3.571 4.107 4.660 5.229 5.578 6.304 7042 19.675 21.026 22.362 23.685 24.996 2.603 3.816 4.575 5.226 5.892 6.571 7261 17275 18.549 19.812 21.064 22.307 24.725 26 217 27688 29.141 30578 26.757 28.300 29.819 11 21.920 12 13 3.074 3565 4.075 4.601 4.404 5.009 5.629 6.262 23.337 24.736 26.119 14 31.319 32.801 7.790 15 8.547 27.488 6.908 7564 5142 5.697 6.265 6.844 7434 5.812 6.408 7015 7633 8.260 7962 8.672 23.542 24.769 25.989 26.296 27587 28.869 28.845 34.267 35.718 37156 38.582 16 9.312 32.000 17 10.085 30.191 31.526 32.852 33.409 10.865 11.651 12.443 34.805 36.191 37566 18 8.231 9.390 19 8.907 10.117 27.204 30.144 20 9.591 10.851 28.412 31.410 34.170 39.997 11.591 29.615 32.671 33.924 35.172 36.415 37652 35.479 36.781 38.076 39.364 40.646 21 8.034 10.283 13.240 38.932 8.897 9.542 10.196 10.856 11.524 41.401 8.643 9.260 9.886 10.520 10.982 11.689 12.338 14.041 30.813 40.289 42.796 13.091 13.848 14.848 15.659 16.473 32.007 41638 44.181 45.559 46.928 12.401 33.196 42.980 25 13.120 14.611 34.382 44.314 15.379 16.151 16.928 11160 13.844 14.573 15.308 16.047 16.791 17.292 18.114 18.939 నర3 36.741 37.916 38885 41.923 43.195 44.461 45.722 46.979 45.642 46.963 26 12.198 48.290 49645 50993 52.336 53672 27 11808 12879 13.565 14.256 14.953 40.113 12.461 41.337 42557 43.773 28 48.278 29 30 19.768 20.599 49.588 50.892 13.121 17.708 18.493 39.087 13.787 40.256 26.509 34 764 29.051 37689 51.805 63167 22.164 55.758 67505 59.342 71 420 63.691 76154 66.766 79 490 40 20.707 24.433 32.357 50 27991 29 07
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