# math (statistics

posted by .

John's z-score on a college entrace exam is 1.3. If the raw scores have a mean of 480 and a standard deviation of 70 points, what is his raw score?

Use a z-score formula to find John's raw score.

The formula: z = (x - mean)/sd -->sd = standard deviation

Using what you know to find what you don't know:

1.3 = (x - 480)/70

Solve for x.

I hope this will help.

## Similar Questions

1. ### math

what is the z-score for the given raw score, mean and standard deviation, assume a normal probability dist. raw score=66,u=60, and 0=6 u and o are those wierd symbols is the answer 1, 10, 6, or 66
2. ### math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution. Raw score = 15, ì = 16 , and ó = 2
3. ### math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution. Raw score = 124, μ = 98, and o = 17 A) 0.65 B) -1.53 C) -0.65 D) 1.53
4. ### Statistics

bob received a z score of 0.9 on a college entrance exam. If the raw scores have a mean of 540 and a standard deviation of 80 points,what is his raw score?
5. ### math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution for raw score = Raw score = 66, µ =60 , and ó =6
6. ### statistics

Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula …
7. ### statistics

say that you have a distribution of exam scores with a mean of 57 and a standard deviation of 7. if a student in the class has a standard score equal to 2.429, what would their raw score on the exam be?
8. ### Statistics

In a normal distribution of scores, four participants obtained the following deviation scores: 11, 22, 15, and 210. (a) Which score reflects the highest raw score?
9. ### Statistics

In a normal distribution of scores, four participants obtained the following deviation scores: +1, -2, +5, and -10. (a) Which score reflects the highest raw score?
10. ### Math Statistics

Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam?

More Similar Questions