the times for the mile run of a large group of male college students are approximately normal with mean 7.11 minutes and standard deviation 0.74 minutes.
use the 68–95–99.7 rule to answer the following questions.
(start by making a sketch like figure 3.8.)

1. what range of times covers almost all (99.7%) of this distribution?
a. 5.63 to 8.59
b. 4.89 to 9.33
c. 6.37 to 7.85
d. 2.22 to 12

What is the difference between the points (4, 7) and (4, -5)? a. 0 units b. 2 units c. 4 units d. 12 units

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.