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Summer Jobs: Compare the Evidence

Compare summer-job pay and work times using random samples, means, medians, MADs, and box plots. Make cautious population inferences.

Grade 7MathInteractive · Printable

Aligned to7.SP.B.4

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
14 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 7
Subject: Math
Question types: Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

Students compare centers and spreads of random samples from two populations.
Students use sample statistics to make cautious inferences about mowing and babysitting jobs.
Students interpret differences in sample centers relative to sample variability.

How to use

Have students calculate sample statistics before making comparisons. Discuss why sample evidence supports a population inference without guaranteeing individual outcomes.

Curriculum

Common Core standard covered

7.SP.B.4

Compare two populations informally using the centers and spreads of random samples from each.

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Name Date

Summer Jobs: Compare the Evidence

Use random samples to compare mowing and babysitting jobs.

Compare Hourly Pay

A youth employment office studies local summer jobs. Use the random samples below for Questions 1–5. MAD means mean absolute deviation.

The office randomly selects six mowing workers and six babysitting workers from its local lists. Each value is one worker's hourly pay before expenses.