Question

The mean score for a standardized test is 1700 points. The results are normally distributed with a standard deviation of 75 points. If 10,000 students take the exam, how many would you expect to score between 1700 and 1775 points?

Answer 1

(1700 - 1700) / 75
= 0 / 75
= 0

(1775 - 1700) / 75
= 75 / 75
= 1

P[0 < z < 1] = P[z = 1] - P[z = 0]
P[z = 1] = 0.8413
P[z = 0] = 0.5

P[0 < z < 1] = 0.8413 - 0.5
= 0.3413

10000 * 0.3413
= 3413 people will score between 1700 and 1775

Answer 2

so 3413 people?

Answer 3

Yup :)

Answer 4

i have three more if you would like help :)

Answer 5

Sure, wats up?

Answer 6

ill post them in other questiosn so you can get more medals :)

Answer 7

k watev :)