Q2 The archers 10 archers take part in a competition. They have two rounds of arrows, one from 50 yards and one from 60 yards. Here are their scores out of 60 for each round. Find the value of the PMCC for the data. PMCC = The judges standardise the scores out of 100 by taking away 10 and doubling the scores. What is the value of the correlation coefficient now? PMCC = Give your answers correct to 3 d.p. 50 yards 10 17 23 26 29 34 41 47 51 54 60 yards 12 22 21 17 17 22 39 47 49 45

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Q: 2.46 -0.18

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Q: (i) 95% confidence interval (ii) 90% confidence interval

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