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Statistics 6. The diagram below shows three z-scores and the corresponding raw scores. What is the value of x, to the nearest tenth? (2 marks)

Statistics

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6. The diagram below shows three z-scores and the corresponding raw scores. What is the value of x, to the nearest tenth? (2 marks) z-scores -2 0 w raw scores 4.2 6.8 X 7. Explain why, for a given confidence level, the margin of error increases as the sample size decreases. (1 mark)

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