8th Grade Two-Way Tables and Relative Frequency Quiz: 10 Questions with Explanations

A 15B 20C 25D 5

15 + 5 = 20.

A joint frequencyB relative frequencyC outlierD marginal frequency

Marginal frequencies are the row and column totals.

A 10%B 25%C 40%D 60%

10/25 = 0.40.

A No, because both bars have a total of 100%B No, because Group A is smallerC Cannot tellD Yes, the percents are very different

30% yes versus 75% yes is a large difference.

A 80% and 60%B 40 and 30C 80% and 30%D 60% and 80%

40/50 = 80% and 30/50 = 60%.

A a strong associationB little or no associationC an outlierD a cause

Equal percents mean the variable does not change the rate much.

A 18%B 36%C 60%D 56%

18 out of 30 is 60%.

A a row totalB a count in a cell of the tableC a column totalD a percent of all

Joint frequencies are the counts inside the table.

A It does not prove cause and effectB It proves cause and effectC It needs three variablesD It only works for numbers

Association shows a pattern, not a reason.

A 35%B 21%C 40%D 65%

21/60 = 0.35.