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Probability and Statistics
Activity 11: A Foot is a Foot
–
Or is It?
67
© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Wrap-up
Ask students:
Was the mean of the combined data from
L
2
the same as
the mean from the Home screen?
What does our combined class data show?
Is the statement true that the average length of a human
foot is 12 inches, or a foot?
Do you think our class data is accurate?
How could we make it even more accurate?
Where could we find data without measuring feet?
Do you think average foot sizes differ around the world?
How could we find out?
Assessment Suggestions
♦ Have students find averages of other sets of data, such
as average arm length in the class, and so on.
♦ Have students write about the definition from the
dictionary and support or disprove the statement using
their class data.
Extensions
♦ Find the average adult foot size and compare it to the
average child foot size.
♦ Research other countries and find out if average foot
lengths differ around the world. Make speculations as
to why foot lengths differ.