To test Ho: u= 50 versus H,: u<50, a random sample of size n= 23 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below. E Click here to view the t-Distribution Area in Right Tail. (a) If x = 47.3 and s= 14.5, compute the test statistic. to = -0.893 (Round to three decimal places as needed.) (b) If the researcher decides to test this hypothesis at the a = 0.05 level of significance, determine the critical value(s). Although technology or a t-distribution table can be used to find the critical value, in this problem use the t-distribution table given. Critical Value: (Round to three decimal places. Use a comma to separate answers as needed.)

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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Question
To test Ho: µ = 50 versus H,: µ < 50, a random sample of size n = 23 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below.
Click here to view the t-Distribution Area in Right Tail.
(a) If x = 47.3 and s = 14.5, compute the test statistic.
tn = -0.893 (Round to three decimal places as needed.)
(b) If the researcher decides to test this hypothesis at the a = 0.05 level of significance, determine the critical value(s). Although technology or a t-distribution table can be used to find the critical value, in this problem use the
t-distribution table given.
Critical Value:
(Round to three decimal places. Use a comma to separate answers as needed.)
Transcribed Image Text:To test Ho: µ = 50 versus H,: µ < 50, a random sample of size n = 23 is obtained from a population that is known to be normally distributed. Complete parts (a) through (d) below. Click here to view the t-Distribution Area in Right Tail. (a) If x = 47.3 and s = 14.5, compute the test statistic. tn = -0.893 (Round to three decimal places as needed.) (b) If the researcher decides to test this hypothesis at the a = 0.05 level of significance, determine the critical value(s). Although technology or a t-distribution table can be used to find the critical value, in this problem use the t-distribution table given. Critical Value: (Round to three decimal places. Use a comma to separate answers as needed.)
t-Distribution
Area in Right Tail
df
1.25
0.20
0.15
0.10
0.025
0,02
0.005
0.0025
0,001
0,0005
1.000
2.
1.963
1.386
1.250
1.190
1.156
15.894
4.849
3.482
2.999
1.376
3.078
6314
12.706
31.821
63.657
127.321
318.309
636.619
0.816
0.765
0.741
0.727
4.301
3.182
2.776
6.965
4.541
3.747
3.365
1.061
0.978
1.886
1.638
1.533
1.476
2.920
2.353
2.132
2.015
9.925
5.841
4.604
14.089
7.453
5.598
4.773
22.327
10.215
7.173
S893
31.599
12.924
8.610
0.941
0.920
2.571
2.757
4.032
6.869
1.943
1895
6.
0.718
0.906
0.896
0.S89
1.134
1.40
2.447
2.612
3.143
3.707
3.499
4.317
5.208
5.959
5.408
4.029
3.833
7
0.711
1415
1.397
1.383
1.372
2.365
2.306
2.517
2.449
1.119
1.108
1.100
1.093
2.998
2.896
2.821
2.764
4.785
4.501
4.297
4.144
0.706
0,703
0.700
L833
1.812
2.262
2.228
3.355
3.250
3.169
5.041
4.781
4.587
2.398
3.690
10
0.879
2.359
3.581
1.363
1356
1350
1.345
1.341
11
12
13
2.328
2,303
3.497
3.428
3.372
0697
0.876
1.796
1.782
1.771
1.761
1.753
2.201
2.179
2.160
2.145
2.718
2.681
2.650
2624
2.602
3.106
0.695
0.694
O.873
0.870
4.025
3.930
3.852
4.437
4.318
4.221
1.083
1079
1076
1.074
3.055
3.012
14
15
0.692
0.691
0.868
0.866
2.282
2.264
2.249
2.977
2.947
3.326
3.286
3.787
3.733
3.686
3646
4.140
4.073
2.131
0,690
0.689
2.921
2.848
0.865
O.63
0.862
0.861
16
17
1.071
1.069
1.337
1.333
1.746
1.740
2.120
2.110
2235
2.224
2.583
2.567
3.252
3.222
4.015
3.965
1.734
1.729
18
0.688
1067
1.066
1.330
1.328
2.101
2.093
2.214
2.552
2.539
2.878
3.197
3.174
3610
3.579
3.922
2.205
2.197
2.61
2.845
19
0.688
20
0,687
0.0
1.064
1.325
1.725
2.086
2.528
3.153
3.552
3850
21
22
0.859
1.063
1.061
1.323
1.321
1319
1318
1.721
1717
1.714
1.711
1.708
2.N0
2.189
2518
2.831
2.819
3.135
3.527
3819
0.858
2508
2.500
2.492
3.505
3485
3.467
0.686
0.685
0.685
0.684
2.074
2.069
2.064
2.183
2.177
2.172
2.167
2.162
3.119
3.104
3.091
3.078
3.792
3.768
3.745
3.725
23
24
1.060
L059
2.807
2.797
2.787
2.779
2.771
2.763
0.857
25
0856
1.316
2.060
2.485
3450
1.0S8
1.057
1056
1055
1055
1054
1O54
1053
LO52
1.052
26
0.684
1.315
2.056
2479
3.067
3.435
3.707
27
28
0,684
0.683
L314
L203
2.052
2048
2.158
2.473
2.467
3.057
3421
3.690
1.313
1.311
1310
3.047
3.408
1.701
L99
1697
L696
L694
1.692
29
30
2.154
2.150
2.147
2.756
2.750
3.674
3.659
3646
0.683
0.683
0.682
0682
0.682
0.682
0.682
0.854
0.854
2045
2.042
2.462
2.457
3.038
3.030
3396
3385
2.453
2.449
2.445
31
0.853
1.309
2.040
2.144
2.744
3.022
1.309
1.308
1307
1.306
3375
3.365
3.356
3.348
3340
3.633
3.622
3.611
3,601
3.591
32
33
0.853
0.853
0.852
OK52
2.037
2.035
2.032
2.030
2.141
2.138
2.738
2.733
3.015
3.008
3.002
2.996
34
35
1691
1.690
2136
2.133
2.441
2438
2.728
2.724
36
37
0.681
0.681
0.852
O.851
1.052
1.306
1.305
1688
2.028
2.131
2.129
2.434
2.719
2.715
2.990
2.985
3333
3.582
10S1
0.681
0.681
0.681
0.851
0.851
0.851
1.051
1O50
LOS0
1.304
1.304
1.303
169
L685
L684
2.026
2.024
2.023
2.021
2.127
2.125
2.123
2.431
2.429
2.426
2.423
2.712
2,708
2.704
2.980
2.976
2.971
3.326
3.319
3.313
3.307
3.574
3.566
3.558
3.551
39
40
0.679
0.679
0.678
0.678
1.676
L671
1667
L664
1662
1.047
1.045
1.299
1.296
1294
1292
2.109
2.099
2.403
2.390
2,678
2.660
2.937
2.915
2.899
2887
50
60
3.261
3.232
0.849
2.009
2.000
3.496
3.460
0.848
0.847
1044
LO43
1.994
1990
1.987
2.093
2.088
2.648
2.639
3.211
3.195
70
2.381
2.374
3.435
3.416
O.846
0.846
90
0.677
1.042
1.291
2.084
2.368
2.632
2.878
3.183
3402
O845
0.842
0.842
1660
1.646
1645
2.364
2626
0.677
0.675
0.674
1290
1.282
1.282
1.984
1.962
1.960
3.174
3.098
3090
2.081
2.871
2813
2.807
100
1042
3.390
1000
1.037
1036
2.056
2.054
2.330
2.326
2.581
2.576
3.300
3.291
Transcribed Image Text:t-Distribution Area in Right Tail df 1.25 0.20 0.15 0.10 0.025 0,02 0.005 0.0025 0,001 0,0005 1.000 2. 1.963 1.386 1.250 1.190 1.156 15.894 4.849 3.482 2.999 1.376 3.078 6314 12.706 31.821 63.657 127.321 318.309 636.619 0.816 0.765 0.741 0.727 4.301 3.182 2.776 6.965 4.541 3.747 3.365 1.061 0.978 1.886 1.638 1.533 1.476 2.920 2.353 2.132 2.015 9.925 5.841 4.604 14.089 7.453 5.598 4.773 22.327 10.215 7.173 S893 31.599 12.924 8.610 0.941 0.920 2.571 2.757 4.032 6.869 1.943 1895 6. 0.718 0.906 0.896 0.S89 1.134 1.40 2.447 2.612 3.143 3.707 3.499 4.317 5.208 5.959 5.408 4.029 3.833 7 0.711 1415 1.397 1.383 1.372 2.365 2.306 2.517 2.449 1.119 1.108 1.100 1.093 2.998 2.896 2.821 2.764 4.785 4.501 4.297 4.144 0.706 0,703 0.700 L833 1.812 2.262 2.228 3.355 3.250 3.169 5.041 4.781 4.587 2.398 3.690 10 0.879 2.359 3.581 1.363 1356 1350 1.345 1.341 11 12 13 2.328 2,303 3.497 3.428 3.372 0697 0.876 1.796 1.782 1.771 1.761 1.753 2.201 2.179 2.160 2.145 2.718 2.681 2.650 2624 2.602 3.106 0.695 0.694 O.873 0.870 4.025 3.930 3.852 4.437 4.318 4.221 1.083 1079 1076 1.074 3.055 3.012 14 15 0.692 0.691 0.868 0.866 2.282 2.264 2.249 2.977 2.947 3.326 3.286 3.787 3.733 3.686 3646 4.140 4.073 2.131 0,690 0.689 2.921 2.848 0.865 O.63 0.862 0.861 16 17 1.071 1.069 1.337 1.333 1.746 1.740 2.120 2.110 2235 2.224 2.583 2.567 3.252 3.222 4.015 3.965 1.734 1.729 18 0.688 1067 1.066 1.330 1.328 2.101 2.093 2.214 2.552 2.539 2.878 3.197 3.174 3610 3.579 3.922 2.205 2.197 2.61 2.845 19 0.688 20 0,687 0.0 1.064 1.325 1.725 2.086 2.528 3.153 3.552 3850 21 22 0.859 1.063 1.061 1.323 1.321 1319 1318 1.721 1717 1.714 1.711 1.708 2.N0 2.189 2518 2.831 2.819 3.135 3.527 3819 0.858 2508 2.500 2.492 3.505 3485 3.467 0.686 0.685 0.685 0.684 2.074 2.069 2.064 2.183 2.177 2.172 2.167 2.162 3.119 3.104 3.091 3.078 3.792 3.768 3.745 3.725 23 24 1.060 L059 2.807 2.797 2.787 2.779 2.771 2.763 0.857 25 0856 1.316 2.060 2.485 3450 1.0S8 1.057 1056 1055 1055 1054 1O54 1053 LO52 1.052 26 0.684 1.315 2.056 2479 3.067 3.435 3.707 27 28 0,684 0.683 L314 L203 2.052 2048 2.158 2.473 2.467 3.057 3421 3.690 1.313 1.311 1310 3.047 3.408 1.701 L99 1697 L696 L694 1.692 29 30 2.154 2.150 2.147 2.756 2.750 3.674 3.659 3646 0.683 0.683 0.682 0682 0.682 0.682 0.682 0.854 0.854 2045 2.042 2.462 2.457 3.038 3.030 3396 3385 2.453 2.449 2.445 31 0.853 1.309 2.040 2.144 2.744 3.022 1.309 1.308 1307 1.306 3375 3.365 3.356 3.348 3340 3.633 3.622 3.611 3,601 3.591 32 33 0.853 0.853 0.852 OK52 2.037 2.035 2.032 2.030 2.141 2.138 2.738 2.733 3.015 3.008 3.002 2.996 34 35 1691 1.690 2136 2.133 2.441 2438 2.728 2.724 36 37 0.681 0.681 0.852 O.851 1.052 1.306 1.305 1688 2.028 2.131 2.129 2.434 2.719 2.715 2.990 2.985 3333 3.582 10S1 0.681 0.681 0.681 0.851 0.851 0.851 1.051 1O50 LOS0 1.304 1.304 1.303 169 L685 L684 2.026 2.024 2.023 2.021 2.127 2.125 2.123 2.431 2.429 2.426 2.423 2.712 2,708 2.704 2.980 2.976 2.971 3.326 3.319 3.313 3.307 3.574 3.566 3.558 3.551 39 40 0.679 0.679 0.678 0.678 1.676 L671 1667 L664 1662 1.047 1.045 1.299 1.296 1294 1292 2.109 2.099 2.403 2.390 2,678 2.660 2.937 2.915 2.899 2887 50 60 3.261 3.232 0.849 2.009 2.000 3.496 3.460 0.848 0.847 1044 LO43 1.994 1990 1.987 2.093 2.088 2.648 2.639 3.211 3.195 70 2.381 2.374 3.435 3.416 O.846 0.846 90 0.677 1.042 1.291 2.084 2.368 2.632 2.878 3.183 3402 O845 0.842 0.842 1660 1.646 1645 2.364 2626 0.677 0.675 0.674 1290 1.282 1.282 1.984 1.962 1.960 3.174 3.098 3090 2.081 2.871 2813 2.807 100 1042 3.390 1000 1.037 1036 2.056 2.054 2.330 2.326 2.581 2.576 3.300 3.291
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