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 GraphsQuestion 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 MeansJack 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 judgeIn 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 Aroha Beth

1 8 9

2 6 9

3 10 7

4 9 8

5 7 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 1043 65 7 8 92 11 12

1 1043 65 7 8 92 11 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 CompanyA 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-news-site.wikispaces.com

/

New York Cop and other practical activities

Bell, Brown and Buckley Cambridge University Press

ISBN 0 521 40645 5