Statistics
Jammu & Kashmir Board · Class 10 · Mathematics
All formulas from Statistics in Jammu & Kashmir Board Class 10 Mathematics. Key equations, constants, and identities for board exam preparation.
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2) Formulas for mean of grouped data
x̄ = Σfi xi / Σfi
Class mark = (Upper class limit + Lower class limit) / 2
di = xi - a
x̄ = a + Σfi di / Σfi
ui = (xi - a) / h
3) Formulas for mode
Mode = l + ((f1 - f0) / (2f1 - f0 - f2)) × h
4) Formulas for median
If n is odd, median = ((n + 1) / 2)th observation
If n is even, median = average of the (n/2)th and ((n/2) + 1)th observations
Median = l + (((n/2) - cf) / f) × h
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