ANSWER C AND D ONLY
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
ANSWER C AND D ONLY
Transcribed Image Text:2. A study was conducted to determine the level of cyanide in 20 exposed spot (soil and water)
within the mine site are listed below:
Spot
Soil
Water
Spot
Soil
Water
1
2.5
4.9
11
1.8
4.2
6.9
7.0
12
1.8
1.1
3
3.1
5.9
13
6.0
10.0
3.3
2.9
14
20.0
11.0
2.1
4.4
15
3.0
5.5
4.6
4.6
16
2.0
2.5
7
3.5
6.9
17
36.0
41.0
8
1.6
1.4
18
2.5
2.3
9
3.1
7.0
19
4.7
4.4
10
7.2
7.7
20
4.1
2.5
a. What is the value of the point estimate?
b. Find a 95% confidence interval for the mean difference, where mean1 and mean2 represent
the true mean level of cyanide in water and soil, respectively. Assume the distribution of the
differences to be approximately normal.
С.
Test the hypothesis that the mean level of cyanide in water is greater than in soil at 0.025
level of significance.
d.
Test the hypothesis that the variances are equal at 0.1 level of significance.
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