Stem-and-Leaf SprigData & Chance · statistics and probability

A clockwork plant of stems and leaves: kinds of data and stem-and-leaf plots.

Kinds of Data and Displays

Kinds of data and stem-and-leaf plots. In MathBound, the free Algebra I adventure game, Stem-and-Leaf Sprig asks these problems, and the only way past is to solve them.

Part of Data Analysis: chapter 12 of the standard course.

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10 questions, no sign-up, nothing saved. Climbs from the basics to harder questions.

What you will practice

Statistical Questions and Kinds of Data. Decide whether a question is statistical: does it expect answers that vary?
Stem-and-Leaf Plots and Frequency Tables. Read values, counts and the mode from a stem-and-leaf plot.

Worked examples

Made by the game’s own question engine. Try each one, then open its steps.

Example 1 · Statistical Questions and Kinds of Data

Why

is

this

a

statistical

question?

How

many

pets

do

the

families

on

our

street

own?

$It$ $starts$ $with$ $the$ $word$ $how$
$It$ $has$ $one$ $correct$ $answer$
$It$ $asks$ $for$ $a$ $number$
$The$ $answers$ $vary,$ $so$ $the$ $data$ $will$ $show$ $variability$

Show the worked steps

$What$ $makes$ $a$ $question$ $statistical$ $is$ $variability$ $in$ $its$ $answers.$
$The$ $answers$ $vary,$ $so$ $the$ $data$ $will$ $show$ $variability$

Answer: $The$ $answers$ $vary,$ $so$ $the$ $data$ $will$ $show$ $variability$

Example 2 · Stem-and-Leaf Plots and Frequency Tables

The

stem-and-leaf

plot

shows

the

points

a

team

scored

in

its

games.

Stem 5678 Leaf 034134678669

Key:

5∣4

means

54 .

What

is

the

least

value?

$5$
$53$
$50$
$0$

Show the worked steps

$The$ $least$ $value$ $is$ $the$ $first$ $leaf$ $on$ $the$ $first$ $stem.$
$It$ $stands$ $for$ $50.$

Answer: $50$

Example 3 · Statistical Questions and Kinds of Data

Which

is

a

statistical

question?

$How$ $tall$ $is$ $the$ $school$ $flagpole?$
$How$ $much$ $do$ $the$ $dogs$ $at$ $the$ $animal$ $shelter$ $weigh?$
$How$ $many$ $pages$ $are$ $in$ $this$ $book?$
$What$ $was$ $the$ $high$ $temperature$ $in$ $town$ $yesterday?$

Show the worked steps

$A$ $statistical$ $question$ $expects$ $answers$ $that$ $vary.$
$How$ $much$ $do$ $the$ $dogs$ $at$ $the$ $animal$ $shelter$ $weigh?$ $Its$ $answers$ $differ$ $from$ $one$ $to$ $the$ $next.$

Answer: $How$ $much$ $do$ $the$ $dogs$ $at$ $the$ $animal$ $shelter$ $weigh?$

Where it is in your textbook

Textbook	Lessons
Standard course	12.3
Big Ideas Math Algebra 1	11.5
Big Ideas Math Algebra 1 (2022)	11.5
Glencoe Algebra 1	0-13
Holt McDougal Larson Algebra 1	10.4
Illustrative Mathematics Algebra 1	1.1-1.3
Illustrative Mathematics Algebra 1 (v.360)	1.1-1.3
Math Nation Algebra 1 (Florida B.E.S.T.)	12.1, 12.2, 12.4
Pearson Algebra 1 Common Core	12-2, 12-5
Reveal Algebra 1	12-3

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