Question

As part of his dissertation, Joe wanted to know if math anxiety differs between males and females. He developed a new measure to assess math anxiety with a scale of 0 – 100, a higher number indicating more anxiety. He went to a large university and asked several sections of an introductory math class to participate.
22.	What is the dependent variable?
23.	What is the scale of measurement of the DV?
24.	What is the independent variable?
25.	What is the scale of measurement of the IV?
26.	What type of sampling method was employed (be more specific than probability or nonprobability)?
27.	What type of validity would be examined by correlating the results of this new math anxiety survey to a previously established test of math anxiety?

Answer 1

(22) dependent variable = math anxiety value (on a scale of 0 - 100).
(23) ratio scale.
(24) independent variable = gender of the person.
(25) nominal scale.
(26) stratified random sampling method has been used (because he has divided the population into 2 strata, males and females).
(27) "Criterion validity" would be examined by correlating the results of this new test with the old one.