As a researcher for an environmental agency, you have been asked to determine if the air qualityin the Philippines has changed over the past 2 years. You select a random sample of 7metropolitan cities and find the number of days each year that these cities failed to meetacceptable air quality standards. The results were given below. Can we conclude that after ayear, there is no improvement in the air quality in the Philippines? Use o=0.15.City1234567Year 1284792230324Year 236651323443812a. In words, define the random variable X1b. Ho:.c. Ha:d. The level of significance ise. Determine the test statistic using the data (show solution).f. Provide the decision rule of the test.g. Decision:h. Write a clear conclusion. You may use the sample format:and X2 sufficient evidence to reject the null hypothesis that at < _% level of significance>.

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As a researcher for an environmental agency, you have been asked to determine if the air quality in the Philippines has changed over the past 2 years. You select a random sample of 7 metropolitan cities and find the number of days each year that these cities failed to meet acceptable air quality standards. The results were given below. Can we conclude that after a year, there is no improvement in the air quality in the Philippines? Use a=0.15. City 1 2 3 5 6 4 7 Year 1 28 47 9 22 30 32 4 Year 2 36 65 13 23 44 38 12 a. In words, define the random variable X1 b. Но с. На: d. The level of significance is e. Determine the test statistic using the data (show solution). f. Provide the decision rule of the test. and X2 =

As a researcher for an environmental agency, you have been asked to determine if the air quality in the Philippines has changed over the past 2 years. You select a random sample of 7 metropolitan cities and find the number of days each year that these cities failed to meet acceptable air quality standards. The results were given below. Can we conclude that after a year, there is no improvement in the air quality in the Philippines? Use a=0.15. City 1 2 3 5 6 4 7 Year 1 28 47 9 22 30 32 4 Year 2 36 65 13 23 44 38 12 a. In words, define the random variable X1 b. Но с. На: d. The level of significance is e. Determine the test statistic using the data (show solution). f. Provide the decision rule of the test. and X2 =

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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Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

Topic Video

Question

As a researcher for an environmental agency, you have been asked to determine if the air quality
in the Philippines has changed over the past 2 years. You select a random sample of 7
metropolitan cities and find the number of days each year that these cities failed to meet
acceptable air quality standards. The results were given below. Can we conclude that after a
year, there is no improvement in the air quality in the Philippines? Use o=0.15.
City
1
2
3
4
5
6
7
Year 1
28
47
9
22
30
32
4
Year 2
36
65
13
23
44
38
12
a. In words, define the random variable X1
b. Ho:.
c. Ha:
d. The level of significance is
e. Determine the test statistic using the data (show solution).
f. Provide the decision rule of the test.
g. Decision:
h. Write a clear conclusion. You may use the sample format:
and X2
<There is / There is no> sufficient evidence to reject the null hypothesis that
<insert null hypothesis in words> at < _% level of significance>.

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