a. What is the number of degrees of freedom that should be used for finding the critical value tu/2? df =O (Type a whole number.) %3D
a. What is the number of degrees of freedom that should be used for finding the critical value tu/2? df =O (Type a whole number.) %3D
Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
Problem 4ECP
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Transcribed Image Text:Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below.
TInterval
(13.046,22.15)
x = 17.598
Sx = 16.01712719
n = 50
Click the icon to view a t distribution table.
a. What is the number of degrees of freedom that should be used for finding the critical value t/2?
Critical t values
df =
(Type a whole number.)
t Distribution: Critical t Values
Left tail
Area In One Tall
0.005
0.01
0.025
0.05
0.10
Degrees of
Area In Two Talls
Degrees of
Freedom
0.01
0.02
0.05
0.10
0.20
Freedom
1
63.657
31.821
12.706
6.314
3.078
1
9.925
6.965
4.303
2.920
1.886
3
5.841
4.541
3.182
2.353
1.638
3
4
4.604
3.747
2.776
2.132
1.533
4
4.032
3.365
2.571
2.015
1.476
6
3.707
3.143
2.447
1.943
1.440
6
7
3.499
2.998
2.365
1.895
1.415
7
3.355
2.896
2.306
1.860
1.397
Critical t value
3.250
2.821
2.262
1.833
1.383
(negat ive)
10
3.169
2.764
2.228
1.812
1.372
10
11
3.106
2.718
2.201
1.796
1.363
11
12
3.055
2.681
2.179
1.782
1.356
12
13
3.012
2.650
2.160
1.771
1.350
13
14
2.977
2.624
2.145
1.761
1.345
14
Right tail
2.947
15
2.602
2.131
1.753
1.341
15
16
2.921
2.583
2.120
1.746
1.337
16
17
2.898
2.567
2.110
1.740
1.333
17
18
2.878
2.552
2.101
1.734
1.330
18
Transcribed Image Text:18
2.878
2.552
2.101
1.734
1.330
18
19
2.861
2.539
2.093
1.729
1.328
19
20
2.845
2.528
2.086
1.725
1.325
20
21
2.831
2.518
2.080
1.721
1.323
21
22
2.819
2.508
2.074
1.717
1.321
22
23
2.807
2.500
2.069
1.714
1.319
23
24
2.797
2.492
2.064
1.711
1.318
24
25
2.787
2.485
2.060
1.708
1.316
25
26
2.779
2.479
2.056
1.706
1.315
26
Critical tvalue
27
2.771
2.473
2.052
1.703
1.314
27
(positive)
28
2.763
2.467
2.048
1.701
1.313
28
29
2.756
2.462
2.045
1.699
1.311
29
30
2.750
2.457
2.042
1.697
1.310
30
31
2.744
2.453
2.040
1.696
1.300
31
32
2.738
2.449
2.037
1.804
1.309
32
33
2.733
2.445
2.035
1.602
1.308
33
34
2.728
2.441
2.032
1.691
1.307
34
Two tails
35
2.724
2.438
2.030
1.090
1.306
35
36
2.719
2.434
2.028
1.688
1.306
36
37
2.715
2.431
2.026
1.687
1.305
37
38
2.712
2.429
2.024
1.686
1.304
38
39
2.708
2.426
2.023
1.685
1.304
39
40
2.704
2.423
2.021
1.684
1.303
40
45
2.690
2.412
2.014
1.679
1.301
45
50
2.678
2.403
2.009
1.676
1.299
50
a/2
a/2
60
2.660
2.390
2.000
1.671
1.296
60
70
2.648
2.381
1.994
1.667
1.294
70
80
2.639
2.374
1.990
1.664
1.292
80
1 007
1 AR2
1 001
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