Question:

16.

Use the paragraph below to answer questions:

To examine the association between snoring and risk of developing type II diabetes mellitus, the authors analyzed data from the Nurses' Health Study cohort. This analysis included 69,852 US female nurses aged 40-65 years without diagnosed diabetes, cardiovascular disease, or cancer at baseline in 1986 when the study began. Snoring patterns were ascertained by questionnaire. During 10 years of follow-up, 1,957 women were diagnosed with type II diabetes. In analyses adjusted for age and body mass index, snoring was associated with risk of diabetes (for occasional snoring vs. nonsnoring, relative risk (RR) = 1.48 (95% confidence interval (CI): 1.29, 1.70); for regular snoring vs. nonsnoring, RR = 2.25 (95% CI: 1.91, 2.66); p for trend

2002;155:387-93.

What is the exposure examined in this study?

- Group of answer choices

- Type II diabetes mellitus

- Age

- BMI

- Snoring

- This is a descriptive study and there is no exposure

The distributions of X and Y are described below. If X and Y are independent, determine the joint probability distribution of X and Y. X 0 P(X) 0.23 0.77 Y 1 2 3 P(Y) 0.4 0.22 0.38 X Y O 2 3E Chapter 4.4, Problem 6E Bookmark Show all steps: ON Using Example 4.4-2, (a) Determine the variances of X and Y. (b) Find P(-X s Y). References Example 4.4-2, Example Let X and Y have the joint pdf 4.4-2 The graph of z - f(x.y) is given in Figure 4.4-1. Let A = [(ry) : 0