Transcript Working With Data

Working With Data
Mode, Median,
Range and Mean
Data
Data are numbers that you collect that tell
you something…like in a survey…
• How many televisions are in your house?
• How many pairs of sneakers do you have?
• How many brothers/sisters do you have?
• How many bowls of ice cream can you eat
at night?
After you collect your data…
You want to ANALYZE it.
That’s what we do when we find
the mode, median, mean and range of data!
HINT, HINT!!
When working with data…
ALWAYS PUT YOUR
NUMBERS IN
ORDER FIRST!!
5, 8, 2, 10, 3, 6, 7, 8
2, 3, 5, 6, 7, 8, 8, 10
Mode
MODE is the number shown the MOST in a
set of data; or occurs MOST often
2, 4, 4, 5, 8, 9, 10
The mode is 4.
Practice with Mode!
The test scores of 9 fifth grade students
are listed below. Find the mode.
82, 92, 75 , 91, 92, 89, 95, 100, 86
Don’t forget to put your numbers in order! It will
help to make it easier to see!!
And the mode is…
92!
Practice with Mode!
The following is the number of problems that
Miss Bossert assigned for homework on 8
different days. What is the mode?
8, 11, 9, 14, 9, 15, 6, 9
And the mode is…
9!
More practice with Mode
Use the deck of cards to pick 5 numbers
randomly.
What is the mode of your numbers?
Remember:
If you do not see a number more times
than any other number, there is
NO MODE!
Shuffle and keep practicing with a
partner!
Median
Median is the middle number
2, 4, 4, 5, 8, 9, 10
Work your way in or do what I like to do…
…draw rainbows!!!
The median is 5.
Median
Median is the middle number
2, 4, 4, 5, 7, 8, 9, 10
Work your way in or do what I like to do…
…draw rainbows!!!
UH….OH…2 numbers
in the middle?!?!
WHAT DO WE DO???
FIND THE AVERAGE OF THE 2
NUMBERS
HERE’S WHAT TO DO:
ADD THE 2 NUMBERS IN THE
MIDDLE
DIVIDE BY 2
(because that’s how many numbers you added
together)
TIME TO PLAY!!
Roll 5 die
Put the dice in order
Find the median!
TIME TO PLAY!!
Roll 6 die
Put the dice in order
Find the median
Remember:
you need to find the average
of the two middle numbers!
Range
Range is the difference between the highest
and lowest numbers in the group.
SUBTRACT smallest from biggest!!
2, 4, 4, 5, 8, 9, 10
The range is 8.
Practice Median and Range
Click the picture below
Mean
Mean is also known as the average of
numbers.
You find the mean/average by adding
all of the numbers in your set.
Then you divide by the number of
numbers you added together.
Mean Examples
A students scored the following on three
social studies tests:
93, 80, 73
What is this student’s mean (or average) score?
1. Add the three numbers together: 246
2. Divide this number by 3 (because you added
three numbers together): 82
3. 82 is this student’s mean (or average) score
Let’s Practice with Mean
Now for a review of
Mode, Median, Range
and Mean!!
DO YOU WANT
TO BE A
MILLIONAIRE?