Question

For the following, consider that IQ scores are normally distributed with a mean of 100 and...

  1. For the following, consider that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
    1. Find the probability that a person has an IQ below 60
  1. Find the probability that a randomly selected person has an IQ between 60 and 85

  1. Find the probability that a randomly selected person has an IQ above 118.

  1. Find the IQ score that cuts off the lower 25% of the population from the upper 75%.

  1. Find the probability that 10 people will have a mean IQ below 80?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
7. IQ scores are normally distributed with a mean of 100 and a standard deviation of...
7. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 points. a. Find the probability that a randomly selected person has an IQ less than 115. b. Find the probability that a randomly selected person has an IQ above 60. c. Find the 80th percentile for IQ scores. d. Find the probability that 20 randomly selected person has an IQ less than 110. e. What percentage of people have IQ scores between 60...
IQ scores in a certain population are normally distributed with a mean of 101 and a...
IQ scores in a certain population are normally distributed with a mean of 101 and a standard deviation of 13. (Give your answers correct to four decimal places.) (a) Find the probability that a randomly selected person will have an IQ score between 99 and 108. (b) Find the probability that a randomly selected person will have an IQ score above 89
IQ scores are normally distributed with mean of 100 and a standard deviation of 15. If...
IQ scores are normally distributed with mean of 100 and a standard deviation of 15. If MENSA only accepts people with an IQ score at the 99th percentile or higher, what is the lowest possible IQ score you can have and still be admitted to the organization? Mental disability has traditionally been diagnosed for anyone with an IQ of 70 or lower. By this standard, what proportion of the population would meet criteria to be diagnosed with a mental disability?...
According to an article in American Scientist, IQ scores are normally distributed with a mean of...
According to an article in American Scientist, IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the following probabilities: a) The probability that a randomly selected person has an IQ score of at least 111. b) The probability that a randomly selected person has an IQ of less than 96. c) The probability that a randomly selected person has an IQ score between 119 and 145. (Please show all work.)
IQ scores are normally distributed with a mean of 110 and a standard deviation of 16....
IQ scores are normally distributed with a mean of 110 and a standard deviation of 16. Find the probability a randomly selected person has an IQ score greater than 115.
IQ scores are known to be normally distributed with a mean of 100 and a standard...
IQ scores are known to be normally distributed with a mean of 100 and a standard deviation of 16. a. Determine the percentage of students who score between 85 and 120. b. Determine the percentage of students who score 80 or greater. c. Obtain the quartiles, Q1, Q2, and Q3 for the IQ scores, and show this on a sketch of a normal curve. Include both a z-axis and an x-axis below the curve. d. If Mensa only accepts the...
Suppose scores on an IQ test are normally distributed. If the test has a mean of...
Suppose scores on an IQ test are normally distributed. If the test has a mean of 100 and a standard deviation of 10. 1. What is the probability that a person who is randomly selected will score between 83 and 102? 2. What is the probability that a person who is randomly selected will score more than 119? 3. What IQ score corresponds to the 83rd percentile for all people?
A) Assume that adults have IQ scores that are normally distributed with a mean of 100...
A) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability that a randomly selected adult has an IQ between 90 and 120. (Provide graphing calculator sequence) B) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard of 15. Find P3D, which is the IQ score separating the bottom 30% from the top 70%. (Provide graphing calculator...
1. IQ tests are normally distributed with a mean of 100 and a standard deviation of...
1. IQ tests are normally distributed with a mean of 100 and a standard deviation of 15. Find the following probabilities: A) If a person is randomly selected, what is the probability that the person had an IQ greater than125? _________________ b) If a person is randomly selected what is the probability that the person has an IQ below 92? c) If 40 people are randomly selected, what is the probability that their mean IQ is between 98 and 108?
Assume that adults have IQ scores that are normally distributed with a mean of 100 and...
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. For a randomly selected adult, find the probability. Round scores to nearest whole number. 1.) Prob. of IQ less than 85 2.)Prob. of IQ greater than 70 3.) Prob. of randomly selected adult having IQ between 90 and 110.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT