Question

2. Answer each of the following as True or False:

1. In a linear correlation testing, any positive value for the linear correlation coefficient (r) statistic always indicates a positive correlation between the two variables.

2. The chi-square test for independence is similar to a correlation in that it evaluates the relationship between two variables.  

3. It is impossible to obtain a value less than zero for the chi-square statistic, unless a mistake is made.

4. In a two-sample t-test, it makes a difference which set of data is labeled set 1 and which is labeled set 2.

Answer 1

a) In a linear correlation testing, any positive value for the linear correlation coefficient (r) statistic always indicates a positive correlation between the two variables. (True)

b) The chi-square test for independence is similar to a correlation in that it evaluates the relationship between two variables. (False)

c) It is impossible to obtain a value less than zero for the chi-square statistic, unless a mistake is made. (True)

d) In a two-sample t-test, it makes a difference which set of data is labeled set 1 and which is labeled set 2.(True)