2. Confidence level : 95%, degree of freedom = 150, x =-15, s= 10 %3D
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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answer 2nd and 3rd questions
Transcribed Image Text:Question. Using *t-table.pdf" file, construct confidence intervals
1. Confidence level : 90%, degree of freedom = 15, i = 10, s= 2
2. Confidence level : 95%, degree of freedom = 150, x = -15, s = 10
3. Confidence level : 99%, degree of freedom = 25, i = 0, s = 5
%3D
->
:)
Transcribed Image Text:t Table
cum. prob
one-tail
two-tails
df
t so
0.50
t 30
t85
0.15
t 975
t
995
t
999
t g995
t 90
0.10
t 99
0.01
.75
95
0.25
0.20
0.05
0.025
0.005
0.001 0.0005
1.00
0.50
0.40
0.30
0.20
0.10
0.05
0.02
0.01
0.002
0.001
0.000
1.000
1.376
1.963
3.078
6.314
12.71
31.82
63.66
318.31
636.62
0.000
0.816
1.061
1.386
1.886
2.920
4.303
6.965
9.925
22.327
31.599
3
4
0.000
0.765
0.978
1.250
1.638
2.353
3.182
4.541
5.841
10.215
12.924
0.000
0.741
0.941
1.190
1.533
2.132
2.776
3.747
4.604
7.173
8.610
5
0.000
0.727
0.920
1.156
1.476
2.015
2.571
3.365
4.032
5.893
6.869
0.000
0.718
0.906
1.134
1.440
1.943
2.447
3.143
3.707
5.208
5.959
2.365
2.306
3.499
3.355
0.000
0.711
0.896
1.119
1.415
1.895
2.998
4.785
5.408
1.397
1.383
8
0.000
0.706
0.889
1.108
1.860
2.896
4.501
5.041
0.000
2.821
0.703
0.700
0.883
1.100
1.833
2.262
3.250
4.297
4.781
10
0.000
0.879
1.093
1.088
1.372
1.363
1.812
2.228
2.764
3.169
4.144
4.587
11
0.000
0.697
0.876
1.796
2.201
2.718
3. 106
4.025
4.437
12
13
14
15
16
17
18
19
20
0.000
0.695
0.873
1.083
1.356
1.782
2.179
2.681
3.055
3.930
4.318
0.000
0.694
0.870
1.079
1.350
1.771
2.160
2.650
3.012
3.852
4.221
0.000
0.692
0.868
1.076
1.345
1.761
2.145
2.624
2.977
3.787
4.140
0.000
0.691
0.866
1.074
1.341
1.753
2.131
2.602
2.947
3.733
4.073
0.000
0.690
0.865
1.071
1.337
1.746
2.120
2.583
2.921
3.686
4.015
0.000
0.689
0.863
1.069
1.333
1.740
2.110
2.567
2.898
3.646
3.965
0.000
0.688
0.862
1.067
1.330
1.734
2.101
2.552
2.878
3.610
3.922
0.000
0.688
0.861
1.066
1.328
1.729
2.093
2.539
2.861
3.579
3.883
0.000
0.687
0.860
1.064
1.325
1.725
2.086
2.528
2.845
3.552
3.850
21
0.000
0.686
0.859
1.063
1.323
1.721
2.080
2.518
2.831
3.527
3.819
22
0.000
0.686
0.858
1.061
1.321
1.717
2.074
2.508
2.819
3.505
3.792
23
24
25
26
27
28
29
30
40
60
80
100
1000
0.000
0.685
0.858
1.060
1.319
1.714
2.069
2.500
2.807
3.485
3.768
0.685
0.684
0.684
0.000
0.857
1.059
1.318
1.711
2.064
2.492
2.797
3.467
3.745
0.000
0.856
1.058
1.316
1.708
2.060
2.485
2.787
3.450
3.725
0.000
0.000
0.000
0.856
1.058
1.315
1.706
2.056
2.479
2.779
3.435
3.707
0.684
0.855
1.057
1.314
1.703
2.052
2.473
2.771
3.421
3.690
0.683
0.855
1.056
1.313
1.701
2.048
2.467
2.763
3.408
3.674
0.000
0.683
0.854
1.055
1.311
1.699
2.045
2.462
2.756
3.396
3.659
0.000
0.683
0.854
1.055
1.310
1.697
2.042
2.457
2.750
3.385
3.646
0.000
0.681
0.851
1.050
1.303
1.684
2.021
2.423
2.704
3.307
3.551
0.000
0.679
0.848
1.045
1.296
1.671
2.000
2.390
2.660
3.232
3.460
0.000
0.678
0.846
1.043
1.292
1.664
1.990
2.374
2.639
3.195
3.416
0.845
0.842
0.000
0.677
1.042
1.290
1.660
1.984
2.364
2.626
3.174
3.390
0.000
0.675
1.037
1.282
1.646
1.962
2.330
2.581
3.098
3.300
0.000
0.674
0.842
1.036
1.282
1.645
1.960
2.326
2.576
3.090
3.291
0%
50%
60%
70%
99.8% 99.9%
80%
Confidence Level
90%
95%
98%
99%
123 567 89o -23 4567 89a E N
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