a) Frequency (f) fx X? efi 15 6 90 1350 225 6 20 11 220 4400 400 17 25 17 425 10625 625 34 30 24 720 21600 900 58 35 14 490 17150 1225 72 40 8 320 12800 1600 80 Total n=80 Σέ2265 [fx²=67925 Find the values of: į, Mean ii. Median ii. Mode iv. Variance; v. Standard deviation

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