In each of the following situations, slate an appropriate null hypothesis H_0 an
ID: 3176611 • Letter: I
Question
In each of the following situations, slate an appropriate null hypothesis H_0 and alternative hypothesis H_a. Be sure to identify the parameters that you use to state the hypotheses. (We have not yet learned how to test these hypotheses.) A sociologist asks a large sample of high school students which television channel they like best. She suspects that a higher percent of males than of females will name MTV as their favorite channel. An education researcher randomly divides sixth-grade students into two groups for physical education class. He teaches both groups basketball skills, using the same methods of instruction in both classes. He encourages Group A with compliments and other positive behavior but acts cool and neutral toward Group B. He hopes to show that positive teacher attitudes result in a higher mean score on a test of basketball skills than do neutral attitudes.Explanation / Answer
a. The null hypothesis is as follows:
H0:pmale-pfemale=0 (there is no difference in population proportion of male and female to name MTV as their favorite channel)
The alternative hypothesis is as follows:
H1:pmale-pfemale>0 (population proportion of male to name MTV as their favorite channel is higher than population proportion of female to do the same).
The parameter in question to be proportion.
b.
The null hypothesis is as follows:
H0:mupositive-muneutral=0 (there is no difference in population mean score on a test for basketball skill for positive teacher attitude and neutral attitude)
The alternative hypothesis is as follows:
H1:mupositive-muneutral>0 (positive teacher attitude result is a higher mean score on a test for basketball
skill compared to neutral teacher attitude).
The parameter in question to mean.
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