Question

1) Which of the following test statistics cannot be negative? (Select all that apply.)

	a.	M
	b.	F
	c.	z
	d.	t

2) For which of the following research situations would it be more appropriate to run an independent samples t-test?

	a.	None of the situations listed here would use an independent samples t-test design.
	b.	A researcher wants to study whether a special diet can increase the average IQ in the U.S. population over its current known mean of 100.
	c.	A researcher wants to study the effects of alcohol by comparing participants' reaction times before and after drinking.
	d.	A researcher wants to test whether race car drivers weigh less on average than marathon runners

3) A publication presents results of the average salary by the rank of a faculty member (professor, associate, assistant, lecturer) and by type of institution (public, private). Select all of the factors and the number of levels each factor has. (Select all that apply.)

	a.	rank with two levels
	b.	salary with three levels
	c.	rank with four levels
	d.	an institution with two levels
	e.	salary with five levels
	f.	institution with three levels

4) In an analysis of variance, we refer to independent variables by another name. What is that name?

Answer 1

1) option B is correct F

2)option B

A researcher wants to study whether a special diet can increase the average IQ in the U.S. population over its current known mean of 100.

3)

c.	rank with four levels

d.	an institution with two levels

4)

predictor ; explanatory variable