Ch. 8 Intro to Hypothesis testing

Question 1

Hypothesis

Answer 1

-educated prediction about a population parameter
-statement
-about a population

Question 2

Directional

Answer 2

-prediction with a specific direction
-one tailed test

Question 3

Nondirectional

Answer 3

-prediction of a difference or relationship without specifying the direction
-two tailed test

Question 4

Hypothesis testing

Answer 4

-statistical process to decide whether there is enough evidence to support your prediction about a population

Question 5

Null Hypothesis

Answer 5

-Not
-H0

Question 6

Alternative Hypothesis

Answer 6

-Support
-H1

Question 7

Steps of hypothesis testing

Answer 7

-state the hypotheses
-determine critical value/region
-compute sample statistics
-evaluate the null
-interpret results

Question 8

Type 1

Answer 8

-reject H0, when its true
-alpha

Question 9

Type 2

Answer 9

-retain H0, when its false
-Beta

Question 10

Cohen’s d

Answer 10

-evaluating the effect size
-small = .2
-medium = .5
-large = .8

Question 11

Alpha level

Answer 11

• level of significance
• α

Question 12

Statistical power

Answer 12

• probability of correctly rejecting H0, when its false
• increase with sample size