WorksheetPremium

Phone Plans: Put the Gap in Perspective

Compare phone-plan bills and download speeds. Express center gaps in MAD or IQR units and use data displays to judge overlap.

Grade 7MathInteractive · Printable

Aligned to7.SP.B.3

Buy this worksheet: $1.50

Or unlock every Premium worksheet with Premium

PrintUnlock to print

Answer keyUnlock to see answers

Assign to classUnlock to assign with a class code

What’s included

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

Details

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

About this worksheet

What students practice

Students express differences between centers in units of a shared or similar measure of spread.
Students distinguish overlap of observed intervals from overlap of the middle 50% of distributions.
Students use center gaps and spreads to evaluate phone-plan comparisons.

How to use

Use after teaching MAD and IQR. Have students mark overlapping intervals on the box plots, then discuss how spread changes the meaning of a center gap.

Curriculum

Common Core standard covered

7.SP.B.3

Judge how much two data sets with similar spread overlap, measuring the gap between their centers in units of that spread.

Preview

OwlSheets.com

Name Date

Phone Plans: Put the Gap in Perspective

Compare monthly bills and download speeds using centers, spreads, and overlap.

Compare Monthly Bills

Use the six recorded bills for each plan. MAD means mean absolute deviation. Include endpoints when comparing intervals.

Monthly Bills from Two Independent Samples
Plan	Bills ($)	Mean ($)	MAD ($)
Metered	20, 24, 28, 28, 32, 36	28	4
Bundle	26, 30, 34, 34, 38, 42	34	4

An observed interval extends from a sample's lowest bill to its highest bill. Sort these possible bill amounts by the intervals they fall inside. An amount need not appear in the records.

$35$40$22$26