Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 20.

Use the 68-95-99.7 rule to find the following quantities.

a. The relative frequency of rates less than

110

using the 68-95-99.7 rule is

enter your response here.

(Round to three decimal places as needed.)

Part 2b. The relative frequency of rates greater than

90

using the 68-95-99.7 rule is

enter your response here.

(Round to three decimal places as needed.)

Part 3c. The relative frequency of rates between

30

and

70

using the 68-95-99.7 rule is

enter your response here.

(Round to three decimal places as needed.)