Chapter 5, Problem 78H

For each probability and percentile problem, draw the picture.

The age of a first grader on September 1 at Garden Elementary School is uniformly distributed from 5.8 to 6.8 years. We randomly select one first grader from the class.

a. Define the random variable. X = _________

b.X=-____

c. Graph the probability distribution.

d. f(x)=

e. $\mu$ =________

f. $\sigma$ = _______

g. Find the probability that she is over 6.5 years old.

h. Find the probability that she is between four and six years old.

i. Find the 70th percentile for the age of first graders on September 1 at Garden Elementary School.