Exam 2 Review - Chapter 7

Question 1

How do you convert a z score into a raw score?

Answer 1

z(standard deviation) + mean

Question 2

What does the z test assume?

Answer 2

• The DV is a scale variable
• Random sampling and selection
• The IV is nominal

Question 3

What distinguishes parametric and nonparametric tests?

Answer 3

Parametric tests means that the inferences made are based on assumptions about the population.

Question 4

What is an alpha level/p level?

Answer 4

The “acceptable” risk of a type I error

Question 5

What is a critical value?

Answer 5

A test statistic value beyond which we reject the null hypothesis. (Also called a cutoff)

Question 6

What is a critical region?

Answer 6

Where the critical value is. (One tailed tests have one, and two tailed tests have two)

Question 7

How do you use a z test for hypothesis testing?

Answer 7

You check if the score in question is beyond the critical values.

Question 8

Hypotheses are about ______

Answer 8

the population.

Question 9

What can the one tailed test determine?

Answer 9

Whether something is greater than, lesser than, greater than or equal to, and lesser than or equal to.

Question 10

What can the two tailed test determine?

Answer 10

Whether or not something is equal.