Statistics
ICSE · Class 11 · Mathematics
All formulas from Statistics in ICSE Class 11 Mathematics. Key equations, constants, and identities for board exam preparation.
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3. Measures of Central Tendency
\bar{x}=(x1+x2+...+xn)/n
\bar{x}=a+(Σdi)/n, di = xi-a
\bar{x}=a+(hΣfiui)/n, ui=(xi-a)/h
Median = ((n+1)/2)th term
Median = [((n/2)th term + ((n/2)+1)th term)]/2
4. Measures of Dispersion
Range = maximum value - minimum value
Range = upper limit of highest class - lower limit of lowest class
Mean deviation about number = Σ|di|/n
Mean deviation about mean = Σ|xi-x̄|/n
Mean deviation about median = Σ|xi-M|/n
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