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mean=(4+5+5+6+6+6+7+7+8+9)÷10=6,3
2. Q2=X2/4(n+1)
=X1/2(38+1)
=X1/2×39
=X19,5
=6,5
median=6,5
=55/10 = 5,5
10x5, 9x6, 6x7, 7x8, 5x9, 1x10
50, 54, 42, 56, 45, 10
10, 42, 45, 50, 52, 54, 56
median = 50