displays of data Flashcards
(12 cards)
1
Q
marginal distribution
A
distribution of only 1 variable in 2 way table (total of row/column)
2
Q
relative marginal distribution
A
marginal total/total
3
Q
conditional distribution
A
cell value/row/column total
4
Q
Describe a distribution (dot plot)
A
- Shape - skew, uni-/bimodal
- Outliers
- Center
- Spread
5
Q
Histogram
A
groups data into bins of equal width
bars TOUCH
6
Q
Resistance
A
measure is resistant if it is minimally affected by extreme values (like median)
7
Q
Interquartile Range
A
Q3-Q1
8
Q
Outliers
A
Q1 - 1.5*IQR + Q3
9
Q
Variance
A
Standard Deviation squared
Uses units^2
10
Q
Standard Deviation
A
Average distance of points to mean
11
Q
Cumulative Relative Frequency
A
the relative frequency of all values below a given value
12
Q
z-score
A
how many standard deviations above/below mean a given point lies
z= (x-mean)/Sx
