# Statistics

If a normally distributed group of test scores have a mean of 76 and a standard deviation of 10. Find the probability that student will earn a grade between 65 and 85

1. 👍 0
2. 👎 0
3. 👁 90
1. http://davidmlane.com/hyperstat/z_table.html

1. 👍 0
2. 👎 0
posted by Damon

## Similar Questions

1. ### Word Problem

A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 25 and a standard deviation of 4.6. Scores on the second test are normally

asked by Lyndse on March 7, 2010
2. ### statistics

The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70?

asked by Anonymous on March 20, 2012
3. ### Statistics

Scores on an IQ test are normally distributed. A sample of 15 IQ scores had standard deviation s=10. The developer of the test claims that the population standard deviation is =15. Do these data provide sufficient evidence to

asked by steph on March 12, 2019
4. ### Algebra

The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.

asked by Anonymous on February 4, 2016
5. ### algebra

The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.

asked by Katie on January 28, 2015
6. ### Math

The scores of students on standardized test are normally distributed with a mean of 300 and a standard deviation of 40. Between what two values do 99.7% of the test scores lie?

asked by Nancy on March 1, 2014
7. ### statistics

A human resources manager wants to determine a confidence interval estimate for the mean test score for the next office-skills test to be given to a group of job applicants. In the past, the test scores have been normally

asked by Rald on June 19, 2013
8. ### maths

An intelligence test used in a particular country has scores which are normally distributed with mean 100 and standard deviation 15.In a randomly selected group of 500 people sitting the test, estimate how many have a score

asked by harish on February 13, 2013
9. ### statistics

Assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentages of scores less than 100 b. relative frequency of

asked by terry on July 19, 2010
10. ### Algebra

I do not understand this homework at all. Any help or elaboration would be greatly appreciated. Thanks. 100 juniors at Southwest High took the SAT test. The scores were distributed normally with a mean of 22 and a standard

asked by Kesha on April 12, 2016

More Similar Questions