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;
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;
