SOLUTION: The scores on a lab test are normally distributed with mean of 200. If the standard deviation is 20, find The score that is 2 standard deviations below the mean
Algebra.Com
Question 769448: The scores on a lab test are normally distributed with mean of 200. If the standard deviation is 20, find The score that is 2 standard deviations below the mean
Answer by John10(297) (Show Source): You can put this solution on YOUR website!
Hi,
you know the mean = 200, standard deviation = 20,
you can use the formula z = mean - (2 standard deviation)(standard deviation)
= 200 - 2(20)
= 200 - 40 = 160
John(john100185@yahoo.com)
RELATED QUESTIONS
The scores on a lab test are normally distributed with mean of 200. If the standard... (answered by stanbon)
Scores on an English test are normally distributed with a mean of 33.7 and a standard... (answered by Boreal)
A math teacher gives two different tests to measure students' aptitude for math. Scores... (answered by rothauserc)
The scores on a test are normally distributed with a mean of 50 and a standard deviation... (answered by ewatrrr)
The SAT scores for MATH are normally distributed with a mean of 480 and a standard... (answered by jpg7n16)
The scores on a certain test are normally distributed with a mean score of 43 and a... (answered by stanbon)
The scores on a certain test are normally distributed with a mean score of 43 and a... (answered by stanbon)
The scores on a certain test are normally distributed with a mean score of 51 and a... (answered by stanbon)
The scores on a certain test are normally distributed with a mean score of 69 and a... (answered by ewatrrr)