Descriptive Statistics Flashcards
1
Q
Descriptive statistics
A
describe the main properties of a data set quantitatively
2
Q
Normal distribution
A
Bell curve
mean= median= mode
3
Q
Skewed distribution
A
when the data contains outliers
4
Q
negative skews
A
to the left, mode is higher
5
Q
Positive skews
A
to the right, mean is higher
6
Q
when distribution is skewed use the
A
median
7
Q
Range
A
difference between high and low #’s
8
Q
variance
A
avg the data may vary from mean
9
Q
standard deviation
A
sq root of variance
MORE SPREAD, HIGHER SD
