Question

i just need a detail answer to the math questions

-Epidemiologic Analysis of Populations at Risk NURS 6020 ative Assessment- Ratio Worksheet nd the professor wonders whether using zinc spray on a regular basis m Update: More students keep getting sick a be correlated with the likelihood of havinB students with the outcome (let's call them use zinc spray on a regular basis ks cold, rather than whether the students have young children. She as cases) and 15 students without the outcome (let's call them controls) rathe and Answer Questidondition (cases), 8 report that they s students who have the outcomet that they do not. Among use zinc spray on a regular basis, while 7 repo students with the outcome (cases), whas question: n on a regular basis to those who do not? [ proportion- why does it not meet the definition Of the 15 students who don't have the outco he ratio of those who use zinc spray Bonus question: note that this is not a e/condition (controls), 10 report ls), what is the ratio of those ion of a proportion? that they use zinc spray on a regular basis, while 5 report that they do not. Among the students without the outcome (contro who use zinc spray on a regular basis to those w who do not? Dont do any calculations to answer this question. Of the two groups, which is more likely to use zinc spray? Why did you choose that group? How much less likely is a case-student to use zinc spray than a control student? Another way of asking this is, what is the ratio of the ratios you calculated above? nf these tells us WHY we see an association (or correlation), only that one exists in this usation! We would need to ask additional questions h wines? To have

Answer 1

i) Sample space contains 15 number of students, 8 report that they use zinc spray on a regular basis, while 7 report they do not. The ratio who use zinc spray on a regular basis to those who do not This is a simple ratio as the numerator and denominator are exact numbers of their representation to the particular cases, for example 8 is exact the number of students who use zinc spray on a regular basis And 7 is exact the number of students who do not use zinc spray on a regular basis. ii) Of the 15 students who don't have the outcome /condition (controls), 10 report that they use zinc spray on a regular basis, while 5 report they do not. The ratio who use zinc spray on a regular basis to those who do not 10

iii) It is more likely that the second group would use zinc spray. we chose 2nd group as it has more number of students who use zinc spray on a regular basis. iv) How much less likely is a case-student to use zinc spray than a control student? For case-student probability that a student to use zinc spray- 8/15 For control- student probability that a student to use zinc spray 10/15 Thus control-student. 10 8 is the probability (or 2 less in 15) less likely is a case-student to use zinc spray than a 15 15 15