Question

Coronary heart disease (CHD) begins in young adulthood and is the fifth leading cause of death among adults aged 20 to 24 years. However, studies of serum cholesterol levels among college students are scarce. One study at a southern university investigated the lipid levels in a cohort of sedentary university students. A total of 85 students volunteered for the study and met the eligibility criteria. The following table summarizes the sample data collected for the blood lipid levels, in milligrams per deciliter (mg/dl), of the participants broken down by gender:

	Females (n1 = 48)		Males (n2 = 37)
	Mean	Standard deviation	Mean	Standard deviation
Total cholesterol	173.70	34.79	171.86	33.24
LDL	96.38	29.78	109.44	31.05
HDL	61.62	13.75	46.47	7.94

Construct a 95% confidence interval estimate for the mean difference in total cholesterol levels for sedentary female and male university students.

Note: Do not do any intermediate rounding in your calculations!

ANSWER:  (Click to select)+-±  ≤ (Click to select)(π1 - π2)(x-bar1 - x-bar2)(μ1 - μ2)(s1 - s2)(σ1 - σ2)μd(n1 - n2)(p1 - p2) ≤ (Click to select)±-+  (report your answers to 4 decimal places, using conventional rounding rules.)

PLEASE ROUND 4 DECIMAL PLACES

Answer 1