Construct a frequency distribution and a percentage distribution that have class intervals with the upper class boundaries $99, $119, and so on.

Construct a frequency distribution.	Cost ($)	Frequency
80	but less than	100	enter your response here
100	but less than	120	enter your response here
120	but less than	140	enter your response here
140	but less than	160	enter your response here
160	but less than	180	enter your response here
180	but less than	200	enter your response here
200	but less than	220	enter your response here

Part 2

Construct a percentage distribution.	Cost ($)	Percentage
80	but less than	100	enter your response here%
100	but less than	120	enter your response here%
120	but less than	140	enter your response here%
140	but less than	160	enter your response here%
160	but less than	180	enter your response here%
180	but less than	200	enter your response here%
200	but less than	220	enter your response here%
	(Round to two decimal places as needed.)

Part 3

b. Construct a cumulative percentage distribution.	Cost ($)	Percentage Less Than Indicated Amount
80	enter your response here%
100	enter your response here%
120	enter your response here%
140	enter your response here%
160	enter your response here%
180	enter your response here%
200	enter your response here%
220	enter your response here%
	(Round to two decimal places as needed.)

Part 4

c. Around what amount does the monthly electricity cost seem to be concentrated? Choose the correct answer below.

A.

Between

$80

and

$140

B.

Between

$100

and

$160

C.

Between

$160

and

$220

D.

Between

$120

and

$180

E.

Between

$140

and

$200

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