« previous next »

Author Question: The proportion of Americans who support the death penalty is .53 . A sample of 1000 randomly ... (Read 61 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Jun 24, 2018
The proportion of Americans who support the death penalty is .53 . A sample of 1000 randomly selected Americans is surveyed by telephone interview. Use Excel to answer the following questions:
 a. What is the probability that the sample proportion of those supporting the death penalty will be less than .50?
 b. What is the probability that the sample proportion of those supporting the death penalty will be at least .55?
 c. What is the probability that the sample proportion of those supporting the death penalty will be between .50 and .55?
 d. For samples of size 1000, 15 of all sample proportions are at most what value?

Question 2

Given that z is a standard normal random variable, what is the value of z if the area to the left of z is .9382?
 a. 1.8
  b. 1.54
  c. 2.1
  d. 1.77


ErinKing

  • Sr. Member
  • ****
  • Posts: 362
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .028
=NORM.DIST(0.5,0.53,0.0157,TRUE)
b. .101
=1-NORM.DIST(0.55,0.53,0.0157,TRUE)
c. .871
=NORM.DIST(0.55,0.53,0.0157,TRUE)  NORM.DIST(0.5,0.53,0.0157,TRUE)
d. .514
=NORM.INV(0.15,0.53,0.0157)

Answer to Question 2

b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa
Population genetics sample question Population genetics sample question
Sample inventory order form. Sample inventory order form.
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
An archaeological sample contains 0.700 g of lead-206 and 2.144 g of uranium-238. Assume that ... An archaeological sample contains 0.700 g of lead-206 and 2.144 g of uranium-238. Assume that ...
Sample lod score curves Sample lod score curves
Video: DNA fingerprinting Animation

For a complete list of videos, visit our video library