8
practice testMultiple Choice

Practice Test

Question 8 • Mathematics I

The table shows the results of a survey of 400 random people on whether they like liquid soap, bar soap, or both. Types of Soap Liquid Not Liquid Total Bar 200 100 300 Not Bar 80 20 100 Total 280 120 400 Which is the marginal relative frequency for the people who do not like bar soap?

Answer
A
120 4 hundredths
B
300 4 hundredths
C
100 4 hundredths
D
280 4 hundredths

Explanation

The marginal total for people who do not like bar soap is 100, from the “Not Bar” row. Divide that total by all 400 people: 100 ÷ 400 = 0.25, or 25 hundredths. Therefore, the correct choice is “100 over 400.”

AI-written and checked against the verified answer.

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