This topic contains a solution. Click here to go to the answer

Author Question: Scores on an aptitude test are normally distributed with a mean of 400 and a standard deviation of ... (Read 44 times)

TFauchery

  • Hero Member
  • *****
  • Posts: 500
Scores on an aptitude test are normally distributed with a mean of 400 and a standard deviation of 60. Explain how you would find any given percentile.
 
  What will be an ideal response?

Question 2

If the probability of a newborn kitten being female is 0.5, find the probability that in 100 births, 55 or more will be female. Use the normal distribution to approximate the binomial distribution.
 
  A) 0.7967 B) 0.8159 C) 0.1841 D) 0.0606



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jackie

  • Sr. Member
  • ****
  • Posts: 324
Answer to Question 1

Answers will vary. Possible answer: Sketch a normal curve and shade the area associated with the given percentage. Use a table of areas for the standard normal curve to find the z-score delimiting the shaded area. Find the x-value corresponding to the z-score by using x =  + z.

Answer to Question 2

C





 

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

For a complete list of videos, visit our video library