EVERYTHING YOU NEED TO KNOW TO GET A

EVERYTHING YOU NEED TO KNOW TO GET A GRADE C STATISTICS (FOUNDATION) AUTHOR

Median is the middle when the numbers are placed in order 25 26 28 30 35 39 29 30. 5 Two members of the team of five have names beginning with J

Mode is the number which occurs most often Mode = 5 =6 The mean is one higher than the mode

Range = Biggest - Smallest 76 - 16 60 Mode is the number which occurs most often 16 16 still occurs the most

Range = Biggest - Smallest 19 - 8 11 13 The men’s range is 11 and the women’s range is 14. The men’s number of driving lessons taken are more consistent. The men’s mean is 13 and the women’s mean is 9. The men have more lessons on average.

Median is the middle 200 250 350 520 when the numbers are placed in order 350 620 800 420 Average is for the whole company and not just the mechanic. Mode is the number which occurs most often 200

0 0 1 1 1 3 4 4 6 20 2 4 Median as it is not distorted by the outlier (20). Median is the middle when the numbers are placed in order

Mode is the number which occurs most often Mode = 1 1 1 2 3 4 Median = 2 5, 5 gives 5, 5, 6 Median = mode = 5 6, 6 gives 5, 5, 6, 6, 6 Median = mode = 6 Median is the middle when the numbers are placed in order 5, 6 gives 5, 5, 5, 6, 6 Median = mode = 5

1 pm 10 Friday – because there were more people waiting on this day. OR Cannot tell – as one set of data for each day is insufficient.

A full pie adds up to 360° £ 600 4 quarters make a full pie 4 x £ 600 2400

126° 105° Total = 75° 30° 24° 360° 120 Angle blue of 120 Cancel down Red r 01 5 Angle in a full pie Number blue = of 120 8 1 12 40 15 Othe Number blue = White Silver Blue Angle in a full pie

x x = 10 ÷ ÷ = 15 Eels and Pike = 30 – 10 - 15 5

= % means ‘out of 100’ = 30 108° 120° 72° Total = 60° 60 360° Smallest = 18 Biggest = 54 Therefore, the stem goes from 1 to 5 Angle in a full pie Obstacle Sack Egg and Spoon 3 - legged 1 8 2 39 3 6 69 4 13 4 5 4

22. 1 Range = Biggest - Smallest 59 - 1 58 Count the number of leaves 42 13 Median is the middle when the numbers are placed in order 15 62 - 27 35

Midpoint Plot midpoint with number of workers 7500 12500 17500 22500 27500 x x x 18 + 3 = 21 earn over £ 20000

Total = x x x 40 FX 80 180 84 60 20 424 CF 10 28 35 39 40 Do not need to work out the midpoint as it is an ungrouped table In this group 10. 60 Modal fee is the one with the highest frequency Modal fee = 10 Median is middle. Add cumulative frequency (CF) column and calculate. Median = 20. 5 th term Median fee = 10

Midpoint FX 3 45 9 225 15 300 21 252 27 216 1038 80 Total = Mean = 1038 80 = 13. 0 mins (1 d. p. ) (Total 3 marks)