Maths Statistics

Mutually exclusive

Cannot happen simultaneously

Assuming A and B are mutually exclusive, P(A and B) = ?

0

Assuming A and B are mutually exclusive, P(A U B) = ?

P(A) + P(B)

Independent means ?

One event does not affect another

Assuming A and B are independent, A and B = ?

P(A) * P(B)

Conditional probability is the probability of

B happening given A (P(B|A))

The conditional probability formula is?

P(B|A) = P(A and B) / (P(A)

All probabilities add to?

1

Probability of A not happening is?

P(A’)

Probability of A or B

P(A)+P(B)-P(A and B)

Frequency Density

Frequency / Class Width

Median

Middle value

Mode

Most common

Range

Max - Min

Bivariate Data

Data that comes in pairs of values

Sigma

Sum of x

Interquartile Range

UQ - LQ

Which is affected by outliers? Interquartile or Range

Range

Variance is? (Relative to standard deviation)

Standard deviation squared

Standard Deviation formula is?

Sum of(x-mean)²/n rooted

Standard Deviation generic definition?

Distance from mean

An easy way of remembering standard deviation formula is?

Root mean of the squares - square of the mean