swathi
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The air quality is assessed in two Midwestern cities,one in which a government program has instituted reducing the amount of carbon monoxide emissions allowed,and one without the govt program.The rates of respiratory problems in both cities are recorded over a 5 year period.Given the design of this study , an appropriate one-tailed null hypothesis would be:a)AIR QUALITY IS RELATED TO RESPIRATORY PROBLEMS IN BOTH OF THE CITIES UNDER STUDY B)AIR QUALITY IS RELATED TO RESPIRATORY PROBLEMS IN THE CITY WITH THE GOVT PROGRAM BUT NOT IN THE OTHER CITY.C)NO EVIDENCE WILL BE FOUND FOR DIFFERENCES IN AIR QUALITY BETWEEN THE TWO CITIES.D)THE RATE OF RESPIRATORY PROBLEMS IN THE CITY WITH THE GOVT PROGRAM WILL NOT BE ANY LOWER THAN THAT OF THE OTHER CITY.E)AIR QUALITY WILL BE INVERSLY RELATED TO THE RATE OF RESPIRATORY PROBLEMS IN BOTH CITIES.
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| swathi
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EXPLAIN WITH ANS
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| robin082006
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The air quality is assessed in two Midwestern cities,one in which a government program has instituted reducing the amount of carbon monoxide emissions allowed,and one without the govt program.The rates of respiratory problems in both cities are recorded over a 5 year period.Given the design of this study , an appropriate one-tailed null hypothesis would be:
a)AIR QUALITY IS RELATED TO RESPIRATORY PROBLEMS IN BOTH OF THE CITIES UNDER STUDY
B)AIR QUALITY IS RELATED TO RESPIRATORY PROBLEMS IN THE CITY WITH THE GOVT PROGRAM BUT NOT IN THE OTHER CITY.
C)NO EVIDENCE WILL BE FOUND FOR DIFFERENCES IN AIR QUALITY BETWEEN THE TWO CITIES.
D)THE RATE OF RESPIRATORY PROBLEMS IN THE CITY WITH THE GOVT PROGRAM WILL NOT BE ANY LOWER THAN THAT OF THE OTHER CITY.
E)AIR QUALITY WILL BE INVERSLY RELATED TO THE RATE OF RESPIRATORY PROBLEMS IN BOTH CITIES.
I go with C
Here is the way to write the Null Hypothesis that I learned during my Quantitative Research Method Course in a Master program.
Ho: no difference in air quality between two cities
H1: there is a difference in air quality between two cities
alpha=0.05 (or 0.01)
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| tolito
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robin i agree with your approach but i would rather choose
Ho: D
H1: E.
the study is concerned with respiratory problems and its relationship with air quality. so they are out to see if there will be any difference in resp problems related to air quality
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| doc179
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I dont get it what is H0 and H1 ?
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| robin082006
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I read the question again, that asks about one-tail
So D is the correct answer
C is the correct answer if the question asks about two-tail null hypothesis.
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| abarbaryan
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1.one-tailed null hypotheses will be
The rate of respiratory problems in the A city (with gov progr)> or = B city /in other words the rate of respiratory problems in the A city will not be any lower than that of the B city/, so the alternative hyp (what we hope to show) will be A
2.two-tailed null hypotheses will be
the rate of respiratory problems in the A city (with gov progr) = B city /in other words no difference between the two cities/,so the alternatuve hyp will be A>B or A
The answer is D
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| abarbaryan
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1.one-tailed null hypotheses will be
The rate of respiratory problems in the A city (with gov progr)> or = B city /in other words the rate of respiratory problems in the A city will not be any lower than that of the B city/, so the alternative hyp (what we hope to show) will be A
2.two-tailed null hypotheses will be
the rate of respiratory problems in the A city (with gov progr) = B city /in other words no difference between the two cities/,so the alternatuve hyp will be A>B
or A
The answer is D
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