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Year 10 Maths Advanced Single Variable and Bivariant Statistics

Comparing Data Sets

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Questions
Question 1
114062

The scores obtained by \(11\) players in the first two rounds of a golf tournament are given in the back-to-back stem-and-leaf plot. 

Back-to-back stem-and-leaf plot of golf scoresFirst round leaves on the left, second round on the right, stems 6 to 9. Stem 6: first 9 8, second 3 4 7 8. Stem 7: first 9 8, second 1 1 2 8. Stem 8: first 9 8 7 6, second 4 4 7. Stem 9: first 3 2 1. Key: 9 | 6 | 3 means 69 in the first round and 63 in the second round.FirstFirstRoundRoundSecondSecondRoundRound669 89 83 4 7 83 4 7 8779 89 81 1 2 81 1 2 8889 8 7 69 8 7 64 4 74 4 7993 2 13 2 1Key: 9 | 6 | 3 means 69 in the first roundKey: 9 | 6 | 3 means 69 in the first roundand 63 in the second roundand 63 in the second round

Find the difference in their means, correct to 1 decimal place. 

10.1
 (1 d.p.) 2 marks

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