Question

The frequency table represents the results of a survey comparing the average age of household members to the way that they watch non-network television.

(Image 1)


Madigan converts the frequency table to a conditional relative frequency table by row.

Television Viewing Method
(Image 2)



Which value should she use for X? Round to the nearest hundredth.

Answer 1

A. 0.09

Explanation:

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Answer 2

From the first table:

1)
`n(\text{Under 40 and Internet})=54;`

2)
`n(\text{Under 40 and Cable})=81;`

3)
`n(\text{40 or older and Internet})=23;`

4)
`n(\text{40 or older and Cable})=92.`

Then you can fill the second table:

1)

`p(\text{Under 40 and Internet})=w=(54)/(250)=0.216;`

2)

`p(\text{Under 40 and Cable})=y=(81)/(250)=0.324;`

3)

`p(\text{40 or older and Internet})=x=(23)/(250)=0.092;`

4)

`p(\text{40 or older and Cable})=z=(92)/(250)=0.368.`

Answer: she should use for
`x=0.092\approx 0.09.`