1. The following pollution levels were recorded at two different sites in Denver this past sunumer. YOU ONLY NEED TO USE THE MEANS AND VARIANCES PROVIDED TO ANSWER THE FOLLOWING QUESTIONS, Perform a two-tailed t-test assuming unequal variances of whether these two mean pollution levels are not significantly different from each other by answering questions a-e below. Ignore missing values. Sie 2 Sie I 94 Day Difr 121 -27 130 141 -11 67 87 -20 134 123 104 110 -6 6 95 147 -52 59 94 -35 I13 113 9 131 II 20 10 89 99 -10 43 missing missing 72 missing %3D 12 missing mean = 96 -13 variance = 925 497 461 a. Compute the degrees of freedom of the t-test. b. Compute the t-statistic of the t-test. c. From the t-distribution table, what is the two-sided critical t-test value to which you will compare the t-statistic using the 5% level of significance? d. From the t-distribution table, what is the approximate two-sided p-value of the t-statistic computed in part b? For example, the p-value is well above A or is well below B. e. What is your conclusion based on the results of this t-lest? CS Scanned with CamScanner 2021
1. The following pollution levels were recorded at two different sites in Denver this past sunumer. YOU ONLY NEED TO USE THE MEANS AND VARIANCES PROVIDED TO ANSWER THE FOLLOWING QUESTIONS, Perform a two-tailed t-test assuming unequal variances of whether these two mean pollution levels are not significantly different from each other by answering questions a-e below. Ignore missing values. Sie 2 Sie I 94 Day Difr 121 -27 130 141 -11 67 87 -20 134 123 104 110 -6 6 95 147 -52 59 94 -35 I13 113 9 131 II 20 10 89 99 -10 43 missing missing 72 missing %3D 12 missing mean = 96 -13 variance = 925 497 461 a. Compute the degrees of freedom of the t-test. b. Compute the t-statistic of the t-test. c. From the t-distribution table, what is the two-sided critical t-test value to which you will compare the t-statistic using the 5% level of significance? d. From the t-distribution table, what is the approximate two-sided p-value of the t-statistic computed in part b? For example, the p-value is well above A or is well below B. e. What is your conclusion based on the results of this t-lest? CS Scanned with CamScanner 2021
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:1.
The following pollution levels were recorded at two different sites in Denver this past
sunumer. YOU ONLY NEED TO USE THE MEANS AND VARIANCES PROVIDED TO
ANSWER THE FOLLOWING QUESTIONS, Perform a two-tailed t-test assuming unequal
variances of whether these two mean pollution levels are not significantly different from each
other by answering questions a-e below. Ignore missing values.
Sie 2
Sie I
94
Day
Difr
121
-27
130
141
-11
67
87
-20
134
123
104
110
-6
6
95
147
-52
59
94
-35
I13
113
9
131
II
20
10
89
99
-10
43 missing missing
72 missing
%3D
12 missing
mean =
96
-13
variance =
925
497
461
a. Compute the degrees of freedom of the t-test.
b. Compute the t-statistic of the t-test.
c. From the t-distribution table, what is the two-sided critical t-test value to which you will
compare the t-statistic using the 5% level of significance?
d. From the t-distribution table, what is the approximate two-sided p-value of the t-statistic
computed in part b? For example, the p-value is well above A or is well below B.
e. What is your conclusion based on the results of this t-lest?
CS Scanned with CamScanner
2021
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