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 129 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?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Sample Exercise Program for Limited Older Adults (cont.) Sample Exercise Program for Limited Older Adults (cont.)
(a) A turbidometry detector measures laser light directly across from the light source. The sample, ... (a) A turbidometry detector measures laser light directly across from the light source. The sample, ...
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
Sample prescription for chlorhexidine. Sample prescription for chlorhexidine.
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur (left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur
A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning ... A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning ...
Video: Epinephrine/NE (heart rate, altered blood flow, glycogenolysis & bronchodilation)

For a complete list of videos, visit our video library