Notes for Quiz 4 Flashcards
What is the process of decision making?
1) theory
2) measurement
3) descriptive statistics
4) inferential statistics
5) decision making
Relationship is a key factor in _______ and __________ ___________.
theory
inferential statistics
_______ are also known as robust statistics.
Outliers
Outliers are also known as ______ _________.
robust statistics
What are the central tendencies of scale variables?
1) mean
2) median
What are the central tendencies of categorical variables?
1) mode
2) frequency
True or False: we no longer use mode in categorical variables
True
_______ _________= one rrepresentative value
Central tendency
What is the dispersion of scale variable?
1) range
2) variance
3) standard deviation
What is mean?
sum of all values divided by the number of units
_______= center value
Median
Median= _______ ______
center value
What is mode?
the most frequent
What is frequency?
number of units/attributes for each attributes
What is range?
maximum-minimum
________= statistical distance
Variance
Variance= __________ _________
statistical distance
What are the 2 types of standard deviation?
1) population deviation
2) sample deviation
What are the 2 types of variance?
1) population variance
2) sample variance
What is the formula for population variance?
sum of distance over N (number of units)
What is the formula for sample variance?
sum of distance over N (number of units) minus 1
What is the formula for population deviation?
Square the sum of distances over N
What is the formula for sample deviation?
Square the sum of distance over N -1
