AP STATS: Formulas Not on Formula Sheet

Front

Interquartile Range (IQR)

Back

IQR = Q₃ - Q₁

Front

Finding Outliers

1.5 times IQR RULE

Back

Q₃ + 1.5(IQR)

Q₁ - 1.5(IQR)

Front

Standard Deviation

Back

Front

Variance

Back

Front

Z-Score

Back

Front

LSRL

Back

ŷ = a + bx

Front

SLOPE of LSRL

Back

Front

Residual

Back

Front

Proving Events Independent

Back

Front

Mean/Expected Value of Combined Random Variables (Addition)

Back

E(X+Y) = E(X) + E(Y)

Expected value = mean