Back to Statistics and Probability — Problem 1 · Task Set 38

8.SP Tutor Intake — Patterns of Association in Bivariate Data

This short check helps your tutor understand where to start. Answer each question on your own, without help. If you're not sure, give your best try — the goal is to find what to work on together, not to grade you.

Grade 8·12 problems·~13 min·Common Core Math - Grade 8·domain·sp

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Procedures

A survey of 40 students recorded whether each has a curfew and
whether each has assigned chores. The two-way table below summarizes
the results.

	Chores	No Chores	Total
Curfew	16	4	20
No Curfew	8	12	20
Total	24	16	40

The value 16 in the "Curfew / Chores" cell is which kind of frequency?

A joint frequency — the count of students who have BOTH a curfew AND chores.

A marginal frequency — the count of all students who have a curfew.

The grand total — the count of all students surveyed.

A relative frequency — the fraction of students who have chores.