19
QuizMultiple Choice

N/A — Exam

Question 19 • Algebra I

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. Television Viewing Method Average Household Age Under 40 Average Household Age 40 or Older Total Internet 54 23 77 Cable 81 92 173 Total 135 115 250 Madigan converts the frequency table to a conditional relative frequency table by row. Television Viewing Method Average Household Age Under 40 Average Household Age 40 or Older Total Internet cap w cap x 1 point 0 Cable cap y cap z 1 point 0 Total 0 point 5 4 0 point 4 6 1 point 0 Which value should she use for cap x ? Round to the nearest hundredth.

Answer
A
0 point 3 0
B
0 point 2 0
C
0 point 2 5
D
0 point 0 9

Explanation

For a conditional relative frequency table by row, divide each entry by its row total. For Internet viewing, the number of households with an average age of 40 or older is 23, and the row total is 77. Thus, cap x = 23 ÷ 77 ≈ 0.30, so the correct choice is 0.30.

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