Stats - Notation & Summary - 7

Population mean symbol?

μ (mu).

Sample mean symbol?

x̄ (x-bar).

Population proportion symbol?

p

Sample proportion symbol?

p̂ (“p-hat”)

Population standard deviation symbol?

σ (sigma)

Sample standard deviation symbol?

s

Parameter

describes a population

What is the five-number summary?

Minimum, Q1, Median, Q3, Maximum.

Which measures are used for symmetric data?

Mean and standard deviation.

Which measures are used for skewed data?

Median and IQR.

Statistic

describes a sample