stats Flashcards
1
Q
nominal data
A
data in CATEGORIES
2
Q
ordinal data
A
data in ORDER/RANK
3
Q
interval data
A
data on a SCALE/MEASUREMENT
4
Q
what are statistical tests used for?
A
- determines whether significant difference or correlation exists
- tells if hypothesis is true and if null hypothesis is rejected or accepted
5
Q
what is the significance level
A
0.5, it means there is 5% chance of error
6
Q
conditions for sign test
A
- look for difference
- repeated measures
- nominal data
7
Q
steps for sign test
A
- data into -/+/=
- sum up +/- signs
- less frequent signs=calculated value (S)
- compare S with critical value S must be equal to or less than critical value to be significant
8
Q
what happens if not significant?
A
alternate hypothesis accepted
9
Q
one tailed test
A
directional hypothesis
10
Q
two tailed test
A
non-directional hypothesis
11
Q
type 1 data
A
false positive, null rejected, alternate accepted
12
Q
type 2 data
A
false negative, null accepted but should have been rejected as alternate is true
