SOLUTION: Statistics. Please help. Thankyou in advance! Suppose the scores for a college entrance examinations are normally distributed with mean 75 and standard deviation equal to 10. What

Question 1113531: Statistics. Please help. Thankyou in advance!
Suppose the scores for a college entrance examinations are normally distributed with mean 75 and standard deviation equal to 10. What proportions of the applicants will get scores in the college entrance exam between 70 and 90?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z test
z=(x-mean)/sd
for 70, the z is (70-75)/10=-0.5
for 90, the z is (90-75)/10=+1.5
from the table or calculator, the probability of z between -0.5 and +1.5 is 0.6247
RELATED QUESTIONS
The scores on a college entrance exam are normally distributed. the mean score is 510,... (answered by jim_thompson5910)

Hi. Please help me solve stats question Suppose scores on exams in statistics are... (answered by Theo)

The achievement scores for a college entrance examination are normally distributed with a (answered by stanbon)

The scores on a college entrance examination are normally distributed with a mean of 550... (answered by Boreal)

The scores on a college entrance examination are normally distributed with a mean of 550... (answered by VFBundy)

Good Day, Sir/Madam. I wish I could show some work, but honestly, I don't even have a... (answered by ikleyn)

Suppose the mathematics section of SAT scores for high school seniors for a specific year (answered by ewatrrr)

Counselors at an exclusive private college look carefully at the applications from high... (answered by stanbon)