Question 1196184: If the heights of male youngsters are normally distributed with a mean of 60 inches. and standard deviation of 10 inches, what percentage of the boys' heights ( in inches) would we expect to be
a. between 45 and 75?
b. Between 30 and 90?
c. Less than 50? d. 45 or more?
e. 75 or more?
f. Between 50 and 75?
Answer by ikleyn(52863)   (Show Source):
You can put this solution on YOUR website! .
The normal distribution curve is a bell shaped curve.
Questions a), b) and f) are to determine the area under the normal distribution curve between the given points.
Questions d) and e) are to determine the area under the normal distribution curve to the right from the given points.
Question c) is to determine the area under the normal distribution curve to the left from the given point.
Go to website
https://onlinestatbook.com/2/calculators/normal_dist.html
and use free of charge online calculator specially intended for such purposes.
Every time, chose an appropriate option and input relevant values to the calculator.
Then click the button " Recalculate ".
You will get the answer immediately.
The shaded area in the plot will show you the area of the interest.
Every time as you get similar problem, you can solve it this way.
This way is the easiest and shortest way to learn the subject.
When you learn the subject enough, you will be ready and may start learning other ways.
|
|
|
