You want to run a logistic regression model to see if there is a relationship between the probability that a woman currently smokes cigarettes

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Q1. (1 pt) You have a variable called “marry” which is not labeled. You want to add these labels:

1 (married), 2 (single), 3 (divorced), 4 (widowed) Which choice below will label the values correctly? (Mark X next to one)

a. __ label values marry 1= married 2=single 3=divorced 4=widowed

b. __label define marlabel 1=married 2=single 3=divorced 4=widowed

label values marry marlabel

c. __ label var marry 1=“married” 2=“single” 3=“divorced” 4= “widowed”

d. _X_label define marlabel 1 “married” 2 “single” 3 “divorced” 4 “widowed”

label values marry marlabel

Q2. (1 pt) You want to run a logistic regression model to see if there is a relationship between the probability that a woman currently smokes cigarettes (yes/no) with her age (in years), her education (in years) and her marital status (as described in Q1). How many binary dummy variables do you need to represent marital status in the model?

Number of dummy variables __3__

Q3. (1 pt) You want to investigate if the percent of a state’s working-age (18 to 64) population that is uninsured in 2019 is related to whether the state expanded Medicaid eligibility for adults (to 138% of poverty or higher) by 2018. What kind of statistical test would be suitable for this? (Mark X next to one)

a. ___ chi-square test

b. ___ t-test

c. ___ one-way analysis of variance, with Scheffe

d. ___ logistic regression

Q4. (1 pt) You type the following Stata command and get the resulting error message:

. mean povlev by raceethx

variable by not found r(111);

Which of the following would fix the problem? (Mark X next to one)

a. ___ mean povlev, over(raceethx) c. __X_ mean povlev, by(raceethx)

b. ___ sum povlev, detail(raceethx) d. ___ mean povlev over(raceethx)

Q5. (1 pt) You have data about 900 nursing homes in 2020. You want to see if there is an association between the percent of nursing home residents who had deaths in 2020 related to COVID-19 (COVIDMORT) and the number of citations for inadequate infection control and prevention each nursing home had in 2019 (INFECTCIT, range from 0 to 5). Write Stata code that would let you test this relationship.

Q6. (1 pt) You now want to run the test from Q5 separately by for-profit/non-profit status of the facility (PROFIT, 1 = for profit, 0 – non-profit). How would you write the command(s)?

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