Using the data below, find ihe: 1. (a) mean (b) median (e) mode (4) QI (e) Q3 () D7 (g) PI0 (h) variance ) standard deviation coefficient of variation Frequency 71 - 80 61- 70 13 51 - 60 10 41-50 12 31- 40 10 21 -30 11-20 9. 1-10 3.

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