Transcript Statistics 7-9 (2) - CED-Mxteachers-news-site

Statistics yrs 7-9 (2)
Alison Fagan Maths advisor
Feed back from last course: Statistics
What activities have you tried from last time
What modifications did you make?
How did it go?
People Graphs
Question with numerical answer,
Average feet
What is the average foot length in your class?
• Working in groups of 4-8
• Draw around your foot ( with shoe on!)
• Cut out the outline
• Measure the length of your foot and write it on the
cutout
• How would you find the average foot length of your
group using the cutouts
• How would you find the average foot length of your
class using the cutouts
Mean of Means
Jack competed in long jump at the school sports.
On the first round his jumps were 4.49, 4.55, 4.48, and
4.56, with a mean of 4.52
On the second round his jumps were 4.59, 4.60, 4.62,
4.59 and 4.61 with a mean of 4.61.
He claims he can find the mean of all his jumps by taking
the mean of his means.
Is he right?
Explain your answer.
What’s in an average?
What is the most useful average ( mean, median or mode)
to describe a typical item in each of the following?
• Size of shoes sold in a shoe store
• Cost of houses in your town
• Salaries in a large company
• A household’s monthly power bill over a year
You be the judge
In a gym competition Aroha and Beth were the best 2 competitors
.The five judges gave them the following scores. Who won the
competition? Explain your answer
Judge
1
2
3
4
5
Aroha
8
6
10
9
7
Beth
9
9
7
8
7
Statistics Puzzles
• Use the cards to answer the questions
Statistics poser?
Two boxes P and Q, each contain 3 jewels
When a jewel worth $5 000 is removed from
P to Q
the mean value of the jewels in each box
increases by $1 000.
What is the total value of all 6 jewels??
Feed back from last course: Probability
What activities have you tried from last time
What modifications did you make?
How did it go?
Queue problem
You have to decide which queue to join.
Throw 2 die and add their values.
If you have a counter in the queue of that
value you can move it across the line.
If your partner has a counter in the queue of
that value they can move it across their line.
Where will you put your counters??
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
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10
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12
Odds or Sixes
Tania and Derek are playing a game with one
die.
They throw the die. If the number on the die
is odd, Tania wins that round.
If the number on the die is a six, Derek
wins.
(It doesn't matter who throws the die.)
Who is more likely to win the game? Why?
How could you make the game fair?
Two’s Company
A container holds 4 yellow balls, 2 blue balls and 1 red
ball.
The balls are identical in all ways except colour.
Shake the container, and look at how the balls settle.
You win if two blue balls touch.
Did you win?
Complete several shakes and look at your results.
Powerpoint available at
http://ced-mxteachers-newssite.wikispaces.com/
New York Cop and other practical activities
Bell, Brown and Buckley Cambridge University Press
ISBN 0 521 40645 5