Problem 3 Displayed below is a pair of frequency distribution containing serum c

Question

Problem 3 Displayed below is a pair of frequency distribution containing serum cotinine levels for a grou of cigarette smokers and a group of nonsmokers. These measurements were recorded as part of study investigating various risk factors for cardiovascular disease.

a. Compare the grouped mean and grouped standard deviation of the serum cotinine leve measurements for both smokers and nonsmokers. For the last interval—300+ ng/ml— consider the midpoint of the interval to be 340 ng/ml.

b. In which interval does the median serum cotinine level fall for smokers? For nonsmokers?

c. Compare the distribution of serum cotinine levels for smokers and nonsmokers.

I just want to check my numbers thanks!!

Continie level Smokers Non-smokers (0-13) 90 4200 14-49 125 57 50-99 166 36 100-149 220 12 150-199 89 5 200-249 213 6 250-299 249 19 300+ 469 21

Explanation / Answer

(a)

(b)

For smokers median lies in the interval 200-249.

For non-smokers the median lies in the interval 0-13.

(c)

By comparing the two frequency distributions it is found that serum cotinine level is very high for smokers and extremely low for non-smokers.

Mean Standard deviation Smoker 206.933 114.978 Non-smoker 1.373 33.626

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.