Notation, Descriptive Statistics, Summary Statistics,

Notation, Descriptive Statistics,
Summary Statistics, and Visualization,
Prof. Dobeck, by Casey B.
∑ - correct answer-capital "sigma"; represents a sum

N - correct answer-population size

n - correct answer-sample size

p - correct answer-proportion of population

µ - correct answer-"mu"; represents the population mean

s - correct answer-sample standard deviation

σ - correct answer-lower-case "sigma"; represents the population standard deviation

pˆ - correct answer-"p-hat"; represents the sample proportion

x ̅ - correct answer-"x-bar"; represents the sample mean

m - correct answer-median

ρ - correct answer-"rho"; represents the population correlation coefficient.

r - correct answer-the sample correlation coefficient

the measure of center which is more resistant to outliers - correct answer-median

the measure of variation which is more resistant to outliers - correct answer-IQR
(Interquartile Range) = Q₃ - Q₁

mean - correct answer-=∑x/n
(The sum of all data values, divided by the number of data values); the average.

median - correct answer-if there are an odd number of data values: the middle value when
the data are ordered

if there are an even number of data values: the average of the two middle numbers when the
data are ordered

outlier - correct answer-an observed value that is notably distinct from the other values in the
dataset;