Question

a) IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally...

a) IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally distributed with a mean of 100 and a standard deviation of 20. Find the approximate number of people in the country (assuming a total population of 323,000,000) with an IQ higher than 133. (Round your answer to the nearest hundred thousand.)

b) The mean batting average in a certain baseball league is about 0.230. If batting averages are normally distributed, the standard deviation in the averages is 0.06, and there are 240 batters, what is the expected number of batters with an average of at least 0.400?

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
IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally distributed...
IQ scores (as measured by the Stanford-Binet intelligence test) in a certain country are normally distributed with a mean of 100 and a standard deviation of 18. Find the approximate number of people in the country (assuming a total population of 323,000,000) with an IQ higher than 126. (Round your answer to the nearest hundred thousand.)
The intelligence quotient (IQ) score, as measured by the Stanford-Binet IQ test, is normally distributed in...
The intelligence quotient (IQ) score, as measured by the Stanford-Binet IQ test, is normally distributed in a certain population of children. The mean IQ score is 96 points, and the standard deviation is 15.72 points. Convert the following into z-scores: a) x = 117 b) x = 132 c) x = 92 c) x = 72
The mean batting average in a certain baseball league is about 0.220. If batting averages are...
The mean batting average in a certain baseball league is about 0.220. If batting averages are normally distributed, the standard deviation in the averages is 0.07, and there are 270 batters, what is the expected number of batters with an average of at least 0.500?
The Stanford-Binet Intelligence Scale is an intelligence test, which, like many other IQ tests, is standardized...
The Stanford-Binet Intelligence Scale is an intelligence test, which, like many other IQ tests, is standardized in order to have a normal distribution with a mean of 100 and a standard deviation of 15 points. As an early intervention effort, a school psychologist wants to estimate the average score on the Stanford-Binet Intelligence Scale for all students with a specific type of learning disorder using a simple random sample of 16 students with the disorder. Determine the margin of error,...
The Stanford-Binet IQ test has scores that are normally distributed with a mean of 100. A...
The Stanford-Binet IQ test has scores that are normally distributed with a mean of 100. A principal in an elementary school believes that her students have above average intelligence and wants verification of her belief. She randomly selects 20 students and checks the student files. She finds the following IQ scores for these 20 students. IQ scores: 110,132, 98, 97, 115, 145, 77, 130, 114, 128, 89, 101, 92, 85, 112, 79, 139, 102, 103, 89 a. Compute the sample...
1. An intelligence quotient, or IQ, is a measurement of intelligence derived from a standardized test...
1. An intelligence quotient, or IQ, is a measurement of intelligence derived from a standardized test such as the Stanford Binet IQ test. Scores on the test are normal distribution with a mean score of 100 and a standard deviation of 15. Draw 1000 samples of size n=9 from the distribution of IQ. Calculate the sample mean of all 1000 samples. Draw the histogram for all sample means in. What is the shape of the sample means? Calculate mean of...
A.) A certain intelligence test has scores that are normally distributed with a mean of 100...
A.) A certain intelligence test has scores that are normally distributed with a mean of 100 and a standard deviation of 10. An individual takes the test and converts his score to a Z-score which he calculates to be 1.5. This corresponds to an actual test score of? B.) Boiling point measurements for a liquid under fluctuating pressure conditions is normally distributed with mean 98 degrees and standard deviation 0.5. The probability that a boiling point measurement exceeds 99 degrees...
Suppose that the batting averages in a specific baseball league are normally distributed with mean 250...
Suppose that the batting averages in a specific baseball league are normally distributed with mean 250 and standard deviation 25. If the league has 600 players, how many players would you expect to have a batting average above 310? Answer: 4.92 or 5. I just need to know how to get to this answer, preferably by a calculator method! I have a TI-84 plus. Thanks in advance.
IQ test scores are normally distributed with a mean of 100 and a standard deviation of...
IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. a) Find the IQ scores that represent the bottom 35% . b) Find the IQ score that represents the 3rd Quartile c) Find the IQ score for the top 5%
12. a) If scores on a certain medical test are normally distributed with mean 50 and...
12. a) If scores on a certain medical test are normally distributed with mean 50 and standard deviation 5, what score (or lower) would place a score in the bottom 10% of scores? b) If scores on a certain medical test are normally distributed with mean 50 and standard deviation 5, and if 30 of these medical test scores are selected at random and the average score is computed, what is the probability that this average score will be greater...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT