Topic 10: Chi Sqaure test Flashcards
1
Q
Chi saqure variables +ex (2)
A
- Statistical test used when data are categorical, cant calculate mean
- Ex: Type of music preference
2
Q
Binomial experiment + ex (2)
A
Each Trial only has two possible outcomes
3
Q
Multinomial experiment + ex (2)
A
- Fixed number of trials in which there are more than 2 possible outcomes for each trial (Multiple categories)
4
Q
Chi Square Goodness-of-fit Test is used to test
A
- Whether a frequency distribution fits an expected distribution that is predicted by theory when observations are sorted on one dimention (test compares observed and expected values)
5
Q
Null and Alternative hypothesis for Goodness of fit + ex
A
- H0= The frequency distribution fits the specified distribution
- HA= The frequency distribution does not fit the specified distribution
6
Q
Observed frequency (O) is found through
A
data collection
7
Q
Expected frequency (E) is found through
A
- using the specufued distribution under H0 and the equation E= npi
8
Q
Requirement of conducting chi test:
A
- Observed frequencies must be obtained by using a random sample
- Each frequency must be >= to 5
9
Q
Degree of freedom for chi-square
A
- K-1
- Where K is the number of categories
10
Q
Chi square test of independence
A
- Used to test the independence of two variables by determining whether the occurence of one variable affects the probability of the occurence of the other variable.
11
Q
Expected frequency for Chi square test of independence
A
12
Q
Chi square test of independence degree of freedom:
A
- (r-1) (c-1)
13
Q
Chi square test of independence Ha and Ho
A
Ho= They are independent
HA= They are dependent
14
Q
Chi square test of independence rejecting Ho phrase:
A
15
Q
Chi Square effect values:
A
