5-Minute Check
 1) Mia took a survey to find out which
sports her friends liked best. Organize the
data into a tally table.
 2) Identify the most popular sport.
Favorite Sport
baseball
basketball
baseball
soccer
baseball
soccer
basketball
track
soccer
track
track
track
Find Mode,
Median, and
Outliers
Objective
By the end of the lesson, you will be
able to identify the mode, median,
and outliers of a set of data.
Standard 4AF1.2 - Identify the
mode(s) for sets of categorical
data and the mode(s), median,
and any apparent outliers for
Introduce
 On your desks, you will find a box or raisins. We will
be using these raisins for an activity on mode,
median, and outliers.
 Mode – the mode in a set of data is the number or
numbers that occur most often. If no number
appears more than once, there is no mode.
 Median – is the number in the middle when the
numbers have been arranged from least to greatest.
 Outlier – is an item of data that is either much larger
or much smaller than the rest of the data. A set may
Raisin Activity
 On your desk you will also find a worksheet and a
sticky note. Make sure everyone at your table has
one of each.
 Please follow these directions:
 1) Estimate how many raisins you think are in your
box without actually opening the box.
 2) Open the box and without taking any out, count the
top layer of raisins and adjust your estimate in
necessary.
 3) Dump out the raisins on your desk and count each
Raisin Activity
 Next, let’s line up from largest to smallest. We are
going to find the range.
 Subtract the smallest from the largest and you will
have the range. What is the range?
 Next, I will call table groups to come up and place
their sticky on the whiteboard where it belongs on
the line plot. Make sure your total on the sticky
note matches the number on the board.
Raisin Activity
 Which total has the most sticky notes?
 This is called the mode. It is the number that appears
most often in our data set.
 Which number appears to be in the middle?
 To find the median, let’s line up again from least to
greatest. If we count in from both sides the same
number, we will find the true median.
 To find median on paper, list the data set from least
to greatest and then count in from both sides the
same number until you reach the middle number.
Raisin Activity
 Are they any outliers? Are there any boxes of
raisins where the total was much larger or much
smaller than most of the data?
 You have just learned about mode, median, and
outliers. Guess what? You get to eat your data!!!
Assignment
Page 132 - #’s 6 - 13
Get them all correct –
No Math Homework