This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A prospective study on the relationship between sleep deprivation and heart disease was done by ... (Read 115 times)

soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
on: Jul 24, 2018
A prospective study on the relationship between sleep deprivation and heart disease was done by Ayas, et. al. (Arch Intern Med 2003). Women who slept 6 hours a night were compared to women who slept for 8 hours a night (reference group). After adjusting for potential confounding variables like smoking, a 95 confidence interval for the relative risk of heart disease was (0.98, 1.42). Based on this confidence interval, state what the association between sleep deprivation and heart disease is.

Question 2

At a small college somewhere on the East coast, 20 of the girls and 30 of the boys smoke at least once a week. Independent random samples of 75 girls and 100 boys are to be selected and the proportions of smokers in the samples are to be calculated. What is probability that the sample proportion of girl smokers is greater than the sample proportion of boy smokers?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 24, 2018
Answer to Question 1

There is no conclusive evidence, based on this study, that the association (as measured by relative risk) is different from 1 (equal risk).

Answer to Question 2

0.0623


soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Relationship between winter rainfall and chuckwalla, Sauromalus, size Relationship between winter rainfall and chuckwalla, Sauromalus, size
William Masters and Virginia Johnson are among the most influential researchers in the history of th William Masters and Virginia Johnson are among the most influential researchers in the history of th
Attachment is a close emotional relationship. Attachment is a close emotional relationship.
The relationship between RH and temperature. The relationship between RH and temperature.
How to Study Physics How to Study Physics
Heart Valves and Circulation of Blood Heart Valves and Circulation of Blood
Video: Glucose Evaluation Procedure

For a complete list of videos, visit our video library