Descriptive statistics in univariate data Flashcards
1
Q
Univariate data
A
one dependent variable
2
Q
What are measures of central tendency
A
Mean, median and mode
3
Q
Mean
A
most common, good is data is normally distributed but can be misleading if skewed
4
Q
Median
A
Good for skewed ordinal, interval or ratio data
5
Q
Mode
A
Only used in nominal data
6
Q
Positive skew
A
tail pointing right, mean larger than median
7
Q
Negative skew
A
tail pointing left, mean smaller than median
8
Q
If data is symmetrical, should measures of central tendancy differ?
A
No
9
Q
Range
A
Never used alone, sensitive to extreme scores
10
Q
Variance
A
Average of squared deviation of each number taken from the mean
11
Q
Standard deviation
A
Measure of variability, square root of variance
12
Q
Kurtosis leptokurtic
A
squished data
13
Q
Kurtosis playkurtic
A
flat spread out data
