HOMEWORK ASSIGNMENT TWO: ONE-TAILED OR TWO? For each of the following hypotheses

Question

HOMEWORK ASSIGNMENT TWO: ONE-TAILED OR TWO? For each of the following hypotheses, identify if the researcher will have to conduct a one-tailed test or a two-tailed test. If they will have to conduct a one-tailed test, indicate whether the expectation is that the outcome will be a positive or negative correlation. If they will have to conduct a two-tailed test, simply mark "N/A" (not applicable) in the column "DIRECTION." EXTRA CREDIT! Choose one of the hypotheses and give a brief explanation as to why you think that it might be correct. You will have to back up your answer with REAL data and cite the source. ONE OR TWO-TAILED TEST? one-taiied test w o-tai) ea HYPOTHESIS DIRECTION? PosItive HI: Cats are more loyal to their owners than dogs H2 The NE Patriots play different offense than the NY Jets H3: Children watch fewer hours of television than adults. | test | N A -| one-tawed test ejtive H4: It costs more money to fly to Hawaiithan it cost to fly to Europe HS: There is a relationship between the number of calories consumed in a day and number of hours binge watching shows on Netflix. H6: People are less likely to commit a crime if they have a college degree H7: The taller a person is, the greater chance of hitting their head on low ceilings. H8: Prisoners who earn their GED while incarcerated are less likely to reoffend. H9: Students who live on campus have different GPAs than those who commute. H10: If you spend time studying for your statistics class, you are more likely to pass the course.

Explanation / Answer

We do a two tailed test, when the variation is in either direction or no variation at all. If we are testing a variation in only one direction, then we conduct one tailed test.

1) Cats are more loyal to owners than dogs

It is a one tailed test in positive direction as we are testing that cats are more loyal than dogs.

2) The NE Patriots play different offense than the NY jets.

Here different can be in either direction. So, it is a two tailed test.

3) Children watch fewer hours of television than adults

Here, were testing only one direction i.e. fewer hours of television than adults. So, it is a one tailed test in negative direction.

4) It costs more money to fly to Hawaii than to Europe.

Here we are testing only one direction i.e. more money than Europe. So, it is a one tailed test in positive direction.

5) There is a relationship between the number of calories consumed in a day and number of hours binge watching shows on Netflix.

There is no direction defined. Hence, it would be a two tailed test.

6) People are less likely to commit a crime if they have a college degree.

It is a one tailed test in negative direction as we are testing in one direction.

7) The taller a person is, the greater chance of hitting head on low ceilings.

It is a one tailed test in positive direction.

8) It is a one tailed test in negative direction.

9) It is a two tailed test.

10)  It is a one tailed test in positive direction.

  

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