Using a t-distribution table or software or a calculator, report the t-statistic which is multiplied by the standard error to form the margin of error for the following cases. a. 90% confidence interval for a mean with 18 observations. b. 90% confidence interval for a mean with 28 observations. c. 99% confidence interval for a mean with 28 observations. Click the icon to view the t-distribution table. a. t= (Round to three decimal places as needed.)
Using a t-distribution table or software or a calculator, report the t-statistic which is multiplied by the standard error to form the margin of error for the following cases. a. 90% confidence interval for a mean with 18 observations. b. 90% confidence interval for a mean with 28 observations. c. 99% confidence interval for a mean with 28 observations. Click the icon to view the t-distribution table. a. t= (Round to three decimal places 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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Transcribed Image Text:Using a t-distribution table or software or a calculator, report the t-statistic which is multiplied by the standard error to form the margin of error for the following cases.
a. 90% confidence interval for a mean with 18 observations.
b. 90% confidence interval for a mean with 28 observations.
c. 99% confidence interval for a mean with 28 observations.
Click the icon to view the t-distribution table.
a. t =
(Round to three decimal places as needed.)
Transcribed Image Text:t-distribution
t Distribution Critical Values
80%
df
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1,100
3.078
1.886
1.638
1.533
1.476
1.440
1.415
1.397
1.383
1.372
1.363
1.356
1.350
1.345
1.341
1.337
1.333
90%
6.314
2.920
2.353
2.132
2.015
1.943
1.895
1.860
1.833
1.812
1.796
1.782
1.771
1.761
1.753
1.746
1.740
Confidence Level
95%
Right-Tail Probability
1025
12.706
4.303
3.182
2.776
2.571
2.447
2.365
2.306
2.262
2.228
2.201
2.179
2.160
2.145
2.131
2.120
2.110
98%
tolo
31.821
6.965
4.541
3.747
3.365
3.143
2.998
2.896
2.821
2.764
2.718
2.681
2.650
2.624
2.602
2.583
2.567
99%
1,005
63.656
9.925
5.841
4.604
4.032
3.707
3.499
3.355
3.250
3.169
3.106
3.055
3.012
2.977
2.947
2.921
2.898
99.8%
1,001
318.289
22.328
10.214
7.173
5.894
5.208
4.785
4.501
4.297
4.144
4.025
3.930
3.852
3.787
3.733
3.686
3.646
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