For each of the following research questions in 1 and 2 below, a) identify the E

Question

For each of the following research questions in 1 and 2 below, a) identify the EV, b) identify the RV, c) state a hypothesis about the expected association between the EV and the RV and d) choose the statistical test that will appropriately test whether or not the EV and RV are associated in the population. When stating your hypothesis in response to the instructions in c) above, you are not required to make formal null/alternative hypothesis statements. You should state the research hypothesis, meaning the prediction that you would make about whether or not you expect the EV to affect the RV as the researcher conducting this study.

1) Taking care of children takes time and energy, and thus could have potential influence on parents’ income. Among married couples who have children, are there any differences between mothers’ average monthly income and fathers’ average monthly income? Monthly income is measured in dollars.

2) Is being incarcerated as a juvenile associated with the likelihood of developing a substance-use disorder (SUD) within 5 years of being released from a detention facility? Incarceration is measured by whether or not a person was incarcerated as a juvenile in a detention facility. SUD is measured by a physician’s or psychologist’s diagnosis of the presence/absence of SUD.

Explanation / Answer

Answer to question# 1)

Part a) The EV here is Gender

Part b) The RV is income.

Part c) The research hypothesis must be that mother's income is less than father's income.

Reason: Since the mother is expected to invest more time and energy with the children, it is expected that she may earn lesser than the father

Part d) We can here make use of the Match pair T test, where the incomes of same couples is compared.

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Answer to question# 2)

Part a) EV is "being incarnated as Juvenile"

Part b) RV is "Development of Substance use Disorder"

Part c) Research hypothesis: Likelihood for deveopling substance use disroder is more for people who are incarnated as a juvenile.

Part d) The best test suited for this kind of data is "chi square test of independence"

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