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

Author Question: A researcher obtained a random sample of 100 smokers and a random sample of 100 nonsmokers. After ... (Read 58 times)

abarnes

  • Hero Member
  • *****
  • Posts: 556
on: Jul 24, 2018
A researcher obtained a random sample of 100 smokers and a random sample of 100 nonsmokers.
 
  After interviewing all 200 participants in the study, the researcher compared the rate of depression among the smokers with the rate of depression among nonsmokers. A) observational study B) experiment

Question 2

Assume that the random variable X is normally distributed, with mean  = 100 and standard deviation s = 20. Compute the probability P(X > 116).
 
  A) 0.2119 B) 0.1977 C) 0.7881 D) 0.2420


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

joechoochoy

  • Sr. Member
  • ****
  • Posts: 306
Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

A


abarnes

  • Hero Member
  • *****
  • Posts: 556
Reply #2 on: Jul 24, 2018
TY


joechoochoy

  • Sr. Member
  • ****
  • Posts: 306
Reply #3 on: Jul 24, 2018
You're welcome


« previous next »
 

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Some breeds of dogs that have been obtained by selective breeding. Some breeds of dogs that have been obtained by selective breeding.
Sample preoperative checklist. Sample preoperative checklist.
The WISC-IV: Sample Items The WISC-IV: Sample Items
Are the resutls from the glucose strip test consistent with the results obtained from the ... Are the resutls from the glucose strip test consistent with the results obtained from the ...
Sample Menu: Carb Choices Sample Menu: Carb Choices
Sample time management planning chart for a massage student. Sample time management planning chart for a massage student.
Video: Chemical Synapse Animation

For a complete list of videos, visit our video library