SOLUTION: Translating research questions into hypotheses. Translate each of the following research questions into appropriate H0 and Ha. A)U.S. Census Bureau data show that the mean house

Question 1192837: Translating research questions into hypotheses. Translate each of the following research questions into appropriate H0 and Ha.
A)U.S. Census Bureau data show that the mean household income in the area served by a shopping mall is $78,800 per year. A market research firm questions shoppers at the mall to find out whether the mean household income of mall shoppers is higher than that of the general population.
B)Last year, your online registration technicians took an average of 0.4 hour to respond to trouble calls from students trying to register. Do this year’s data show a different average response time?
C)In 2019, Netflix’s vice president of original content stated that the average Netflix subscriber spends two hours a day on the service Because of an increase in competing services, you believe this average has declined this year.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Ho: the mean income is unchanged from the population.
Ha: the mean income is different from the population (more conservative two-way hypothesis).
-
Ho: the mean time spent on Netflix has stayed the same or has increased this year.
Ha: the mean time has decreased this year. (this is a one way test, which one might use if there were strong evidence a priori that there might be a negative change).
The main thing is the both hypotheses have to cover all the possibilities, and Ho is either = or >- / <= and Ha is what is left over.
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