A small gold mine in Wales wants to open its doors to the public and charge them to visit the ‘gold-face’.

To keep the public safe each visitor will be issued with a pack containing a pair of sturdy pair of boots and a pair of gloves.

Is it possible to pre-pack the items so that someone giving their shoe-size automatically gets a pack with reasonably well fitting gloves?

Is there a ‘correlation’ between Shoe Size and Hand Size?

Is there a ‘correlation’ between Shoe Size and Hand Size?

A Scattergraph is used to determine if a correlation exists

Shoe Hand

What is this?

If you were making a new chocolate bar weighing around 45g what price should it be?

Which chocolate bar

is ‘best’ value for money?

Type Cost Weight

Finger of Fudge 15p 19g

Dairy Milk 60p 49g

Buttons 19p 23g

Galaxy Bar 58p 46g

Fairtrade Co-op 37p 40g

Boost 55p 60.5g

Twix 58p 58g

Snickers 46p 58g

Kit Kat 49p 44g

Curly Wurly 20p 26g

Milky bar 17p 12g

Smarties 45p 21g

10 14 18 22 26 30 34 38 42 46 50 54 58 62

60

55

50

45

40

35

30

25

20

15

Cost in pence

Weight in grams

1) If you plot cost against weight as a pair of coordinates for each bar what do you notice?

2) Which chocolate bar is the ‘best’ value for money?

3) Which chocolate bar is the ‘worst’ value for money?

4) 45g, how much do you it will cost?