Show and describe variability

Mini-lesson 2

1

Data Literacy Project

Range?

Shape of distribution?

Where is the center of the data? day of the year

Lowest value

Highest value

On what day does the ice go out on Swan Lake?

What is the range of each set of data?

A. On what day of the year does the ice usually go out on Swan Lake?

B. How old are the bears killed in Maine’s bear hunt?

C. How fuel-efficient are the cars driven by Hutchinson Center students?

D. How many minutes are there between Old Faithful eruptions?

Describe the shape of each distribution

A. On what day of the year does the ice usually go out on Swan Lake?

B. How old are the bears killed in Maine’s bear hunt?

C. How fuel-efficient are the cars driven by Hutchinson Center students?

D. How many minutes are there between Old Faithful eruptions?

NormalSkewed

Evenly Scattered

Bi-modal

Which measure best describes the “center”

of each data set? (mean? median? mode?)

A. On what day of the year does the ice usually go out on Swan Lake?

B. How old are the bears killed in Maine’s bear hunt?

C. How fuel-efficient are the cars driven by Hutchinson Center students?

D. How many minutes are there between Old Faithful eruptions?

How much electricity do US households use each month?

State

2009 Avg. Monthly

Consumption (kWh)

Connecticut 724Maine 521Massachusetts 610New Hampshire 623Rhode Island 566Vermont 576New Jersey 676New York 581Pennsylvania 842Illinois 728Indiana 992Michigan 644Ohio 878Wisconsin 689

Range =Shape of the distribution=Center =

Frequency plots help you see the variability in a data set