Relationships between variables

Question 1

an odds ratio can be used for qualitative variables with what conditions?

Answer 1

must be only two outcomes (binary variables)

Question 2

what is the best way to graphical display for one quantitative variable and one qualitative variable?

Answer 2

box plot

Question 3

what does the spearman rank-order correlation coefficient (rs) compare? what do the values mean?

Answer 3

1. compares qualitative vs quantitative
2. +1 - strong positive relationship
3. -1 - strong negative relationship
4. 0 - no relationship

Question 4

what does the pearson correlation coefficient measure?

Answer 4

direction and strength of the linear relationship of two factors in which the data for both factors are measured on an interval or ratio scale of measurement

Question 5

regression analysis analyzes what types of variables?

Answer 5

1. one quantitative dependent variable

2. one or more quantitative or qualitative (binary) variable(s)

Question 6

what is measured with logistic regression?

Answer 6

estimating probability of binary situations (male vs emale, yes vs no)