The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be normally distributed with a standard deviation of 4. What percent of students earn a score between 75% and 92%?

The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be normally distributed with a standard deviation of 4. What percent of students earn a score between 75% and 92%?

0.6823

0.7576

0.7956

0.7731

Question

The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be normally distributed with a standard deviation of 4. What percent of students earn a score between 75% and 92%?

The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be normally distributed with a standard deviation of 4. What percent of students earn a score between 75% and 92%?

 0.6823

 0.7576

 0.7956

 0.7731

anonymous · Answer

i used the calculator and i got D .. is it correct? @rational  @amistre64

anonymous · Answer

@jim_thompson5910

jim_thompson5910 · Answer

you have a TI83 or TI84 calculator, correct?

anonymous · Answer

yea but i used an online calculator

jim_thompson5910 · Answer

which one?

anonymous · Answer

http://www.mathportal.org/calculators/statistics-calculator/normal-distribution-calculator.php

jim_thompson5910 · Answer

you have the correct answer