Question

The data below shows the number of kilowatt hours of electricity used by the tenants of a small apartment building in a given month. What is a cumulative table that represents the data?

80 85 86 90 96 75 66 70

99 65 70 99 70 73 64 92

72 81 88 91 93 69 77 82

Answer 1

A.
Kilowatt Hours Frequency Cumulative Frequency
60-69 7 24
70-79 4 24
80-89 5 24
90-99 6 24


B.
Kilowatt Hours Frequency Cumulative Frequency
60-69 4 4
70-79 7 11
80-89 6 17
90-99 7 24


C.
Kilowatt Hours Frequency Cumulative Frequency
60-69 4 4
70-79 6 10
80-89 7 17
90-99 7 24


D.
Kilowatt Hours Frequency Cumulative Frequency
60-69 7 7
70-79 4 11
80-89 7 18
90-99 6 24

Answer 2

I'm so lost :(

Answer 3

Hold on I didnt check the numbers in the second column
how many values are there in the range 60-69?

Answer 4

i count 4
64 , 65 , 66 and 69

so that is 4

Answer 5

ok

Answer 6

So that means either B or C are correct. Right?

Answer 7

right

Answer 8

Now can you tell me how many values in the range 70-79 are present in the list?

Answer 9

count them

Answer 10

7?

Answer 11

yes

so now you can choose the right option

Answer 12

it's B right :)

Answer 13

right

adn the last column - cumulative frequency is correct as well.

Answer 14

B is the correct choice.

Answer 15

thanks :)

Answer 16

yw