Explore BrainMass

Normal distribution

1200 males students average height was 5 feet 7 inches with a std. Deviation of 5 inches. If heights are distributed normally what is the expected number of students that are.

A. Greater than 6 feet tall

b. Between 5 feet and 6 feet.

Solution Preview

Let X denotes the height of students in inches.
Here it is given that X is normally distributed with mean 5 feet 7 inches = 67 inches and standard deviation 5 inches.
Then, we have Z =(X-67)/5 follows a Standard Normal ...

Solution Summary

The determination of probabilities using Normal distribution is discussed in the solution.