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Transcript of AVERAGES
Today you will learn how to:
find the mean, median and mode and use them to compare two sets of data
find the range and use it to describe the spread within sets of data.
Find the most frequent number
3, 9, 5, 7, 2, 1, 5, 6, 8, 9, 7, 5
Find the largest and the smallest number
27, 35, 17, 11, 37, 24, 13, 41
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Add these numbers.
2, 2, 6, 4, 8, 2, 4
What is the most frequent number?
3, 5, 7, 4, 2, 1, 8
Find the number which is in the middle.
(The number that occurs most often.)
Find the value for: largest - smallest
Divide your answer by number of numbers you added.
Order numbers and find which number is in the middle.
What do you get when you take away the smallest number from the largest?
What do you get when you add all numbers and then divide by number of numbers added?
Grab a mini white-board and
get ready for a warming up
HOW TO WIN THE NATIONAL LOTTERY?
What is the chance of winning a jackpot?
In LOTTO 6/49 six numbers are drawn from a range of 49 and if the six numbers on a ticket match the numbers drawn, the ticket holder is a jackpot winner.
What is a chance of winning?
There are 49 numbers in a machine and all of them are equally likely to be picked. So for:
draw 1 => 49 numbers
draw 2 => 48 numbers
draw 3 => 47 numbers
draw 4 => 46 numbers
draw 5 => 45 numbers
draw 6 => 44 numbers
49x48x47x46x45x44 = 10,068,347,520
If a ticket has the numbers 1, 2, 3, 4, 5, and 6, it wins as long as all the numbers 1 through 6 are drawn, no matter what order they come out in. Accordingly, given any set of 6 numbers, there are 6 × 5 × 4 × 3 × 2 × 1 = 720 orders in which they could be drawn.
Dividing 10,068,347,520 by 720 gives 13,983,816.
So the chance to win a jackpot is
1 : 13,983,816
Is it possible to predict winning numbers?
Will I win if I buy all possible combinations of numbers?
How much money would you have to spend on lotto tickets? The chance of winning is:
1 : 13,983,816
To make a profit what would the minimum jackpot have to be?
What if there is more then one jackpot winner?
Our lottery numbers prediction for next Saturday
On your mini white-board write 6 numbers you think will occur in the Saturday draw.
What do we need to do now?
Challenge yourself and match the cards!
Challenge yourself and match averages with bar charts!
On a sticky note write:
What worked well (WWW)
Even better if (EBI)
Mean - add all numbers up, then divide how many you have.
number when the numbers are put in order.
de is the
st frequent value.
Range is the difference between the highest value and the lowest value.