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Chapter 10 AnswersChapter 10 Answers 1 (a)

Faults 0 1 2 3 4 5 6 7

Frequency 6 5 9 13 6 5 4 2

(b)

2

3 90° 60° 210°

4 (a) 43.2 36 64.8 93.6 43.2 36 28.8 14.4

(b)

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5 (a) 88 120 104 48

(b)

11

45

6 (a) (b)

Test A 15 35 34 23 35 27 36 20

Test B 20 37 35 25 33 30 39 28

Test A 34 23 24 30 40 25 35

Test B 36 27 24 33 35 27 32

(c) A strong positive correlation is evident between the two marks.

(d)

(e) 14

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7 (a)

Goals 12 15 16 19 22 24 26 27 30 33

Points 8 9 13 18 17 21 20 21 25 24

(b) There is a strong positive relationship.

(c) (i) 23 points ±1

(ii) 16 goals ±1