SOLUTION: One hundred boys in Year 9 were weighed. Their mean mass was found to be 62 kg with a standard deviation of 6.0 kg. Find approximately: (a) the percentage of students with a ma

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: One hundred boys in Year 9 were weighed. Their mean mass was found to be 62 kg with a standard deviation of 6.0 kg. Find approximately: (a) the percentage of students with a ma      Log On


   

Question 1193565: One hundred boys in Year 9 were weighed. Their mean mass was found to be 62 kg with a standard deviation of 6.0 kg. Find approximately:
(a) the percentage of students with a mass between 56 kg and 68 kg
(b) the percentage of students with a mass between 50 kg and 74 kg
(c) the percentage of students with a mass of more than 74 kg.
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!
.

It is about finding the area under the normal curve.

Use free of charge online calculator

https://onlinestatbook.com/2/calculators/normal_dist.html

specially intended for this purpose.