Lecture 8: Non-parametric tests

Question 1

What leads to chi-squared test?

Answer 1

Q: What sort of measurement? A: Categorical (in this case counts or frequencies)
Q:How many predictor variables? A: One
Q: What type of predictor variable? A: Categorical
Q: How many levels of the categorical predictor? A: Not relevant
Q: Same or Different participants for each predictor level? A: Different
This leads us to and Chi-square test for independence of groups

Question 2

In chi-square test, participants is allocated to one and only one category such as - (3)

Answer 2

pass or fail,

pregnant or not pregnant,

win, draw or lose

Question 3

Since each participant is allocated to one category in chi-squared test each individual therefore

Answer 3

contributes to the frequency or count with which a category occurs

Question 4

Table scenario in which cats can be trained to dance more effectively with food or affection at reward - chi-squared test

Answer 4

Question 5

Table scenario in which cats can be trained to dance more effectively with food or affection at reward - chi-squared test

what are the four categories? - (4)

Answer 5

• could they dance - yes
• could they dance - no
• food as reward
• affection as reward

Question 6

Table scenario in which cats can be trained to dance more effectively with food or affection at reward - chi-squared test

highlight the frequencies for four categories

Answer 6

Question 7

Table scenario in which cats can be trained to dance more effectively with food or affection at reward - chi-squared test

what do the rows give?

Answer 7

Row totals give frequencies of dancing and non-dancing cats