Chapter 7, Problem 61H

Previously; De Anza statistics students estimated that the amount of change daytime statistics students carry is exponentially distributed with a mean of 50.88. Suppose that we randomly pick 25 daytime statistics students.

a. In words, X = ________________

b.X $\sim$______(_______,______)

c. In words, X = _______________

d. $\bar{X}$ $\sim$_______(______,_______)

e. Find the probability that an Individual had between 50.80 and 51.00. Graph the situation, and shade in the area to be determined.

f. Find the probability that the average of the 25 students was between 50.80 and 51.00. Graph the situation, and shade in the area to be determined.

g. Explain why there is a difference in part e and pan f.