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A teacher tested her students to find out how many sit-ups they could do in 1 minute. She arranged the scores into a grouped

A teacher tested her students to find out how many sit-ups they could do in 1 minute. She arranged the scores into a grouped frequency distribution: X f Cum.f 70-74 2 83 65-69 4 81 60-64 7 55-59 9 50-54 10 45-49 12 40-44 13 35-39 11 30-34 7 25-29 5 20-24 3 N = 83 77 70 61 51 39 26 15 8 3 6. What scores best represent (a) Q: (b) Q: (c) Q?

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