
Goal:
Students
calculate means, medians and modes for a series of observations
and report their conclusions

Grade
Level:
49

Objectives:
 Construct
data table appropriate for organizing selected data
 Collect
data in systematic manner
 Use
data table to calculate means, medians and modes for the
collected data
 Compare
and report

Subject
Area or Standard:
Science
and Measurement
Scientific method

Materials
Needed:
 Samples
of data tables
 Assorted
measurement tools
 Handheld
calculators
 Paper
and pencil

Websites:
http://www.oesr.qld.gov.au/censusatschool/resources/2001/worksheets/mmm.pdf

Resources:
Male Female
 2  1
 2  2
 2  4
 2  5
 3  5
 3  6
 4  6
 4  7
 4  7
 6  8
Total 32  51
Mean 5.818  9.2727
Median 3  5
Mode 2  5


Procedures:
1.
Students construct data table similar to that in Lesson
Plan 7.
2. Go over definitions and formulae for calculating means,
medians and modes.
3. Students calculate means, medians and modes for their
individual data sets.
4. Students present the three calculations in form of plots,
charts or graphs and compare
5. Ask students if the mean will always be larger than the
median?

Alternatives:
Have
students change their data sets so that the median is larger
than the mean.

