Statistics Flashcards
1
Q
Name some measures of variability and describe them
A
Range
Measure of symmetry: Pearson’s Skewness Co-efficient = (mean - median)/ SD
2
Q
If the PSC is above .2 or below -.2 what does it mean?
A
severe skew
3
Q
What is leptokurtic?
A
when the curve has a distinct peak
Positive kurtosis
4
Q
What is platykurtic?
A
When the curve is flat
Negative curtosis
5
Q
What are the types of statistical tests?
A
Parametic and non-parametric (distribution free)
6
Q
What are the type I and Type II errors? What is Power?
A
Type I = rejecting the null hypothesis when it is true
Type II = accepting the null hypothesis when it is false
Power = rejecting the null hypothesis when it is false
