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

2. Median is the middle when the numbers are placed in order25 26 28 30 35 39 29
30.5
Two members of the team of five have names beginning with J

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

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

5. 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.

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

7. Median is the middle when the numbers are placed in order1 1 1 3 4 4 6 20 2 4
Median as it is not distorted by the outlier (20).

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

9. 1pm 10
Friday – because there were more people waiting on this day. OR
Cannot tell – as one set of data for each day is insufficient.

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

11. 126° 105° 75° 30° 24° Number blue = of 120 Red Other 1 5 Number blue =
Angle in a full pie
Total =
120
360°
Angle blue
Number blue = of
120
Cancel down
Red
Other 1 5
Angle in a full pie
Number blue = of
120 8 1 4
White
Silver 15
Blue

12. x x
= 10
= 15
Eels and Pike = 30 – ÷ ÷ 5

13. % means ‘out of 100’ Obstacle Egg and Spoon Sack 3 - legged
% means ‘out of 100’ = = 30
108°
120°
72°
60°
Total = 60
360°
Smallest = 18
Biggest = 54
Therefore, the stem goes from 1 to 5
Angle in a full pie
Obstacle 1 8
Egg and Spoon 2 3 9
Sack 3 6 6 9 4 1 3 4
3 - legged 5 4

14. Median is the middle when the numbers are placed in order
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 35 15

15. Plot midpoint with number of workers
7500
Plot midpoint with number of workers
12500
17500
22500
27500 x x x x x
= 21 earn over £20000

16. Do not need to work out the midpoint as it is an ungrouped tableFX CF x 80 10 x
180 28
In this group x 84 35 x 60 39 x 20 40
Total = 40
424
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 = 20.5th term
Median fee = 10

17. Mean = = 13.0 mins (1d.p.) Midpoint FX 3 45 9 225 15 300 21 252 27 216
Total = 80
1038
1038
Mean =
= 13.0 mins (1d.p.) 80
(Total 3 marks)