SOLUTION: 1. The salary of workers x in a certain company is approximately normally distributed with a mean of $ 2500 and a standard deviation of $ 50. The company would like to claim that

Algebra ->  Probability-and-statistics -> SOLUTION: 1. The salary of workers x in a certain company is approximately normally distributed with a mean of $ 2500 and a standard deviation of $ 50. The company would like to claim that       Log On


   

Question 932303: 1. The salary of workers x in a certain company is approximately normally distributed with a mean of $ 2500 and a standard deviation of $ 50. The company would like to claim that 80 % of workers got salary within $c. Find the value of c that makes this statement true?
2. The amount of rainfall x in a certain country in summer is approximately normally distributed with a mean of 3.8 ml and a standard deviation of 1.05, The members of weather forecast would like to claim that 86.5 % chance of rainfall is within c ml. Find the value of c that makes this statement true?
3. The grade Y in a certain subject is approximately normally distributed with a mean of 16 and a standard deviation of 5.71. The teacher would like to claim that 90.5 % of students got within Y marks. Find the value of Y that makes this statement true?

please help me to answer these three questions :(
Answer by emanAZ(2) About Me  (Show Source):
You can put this solution on YOUR website!
I'm waiting for answers ,
The due date is today evening :(
plz help me ..