CHAPTER 5

Question 1

a conjecture concerning one or more populations whose veracity can be established using sample data

Answer 1

statistical hypothesis

Question 2

statistical hypothesis which the researcher doubts to be true

Answer 2

null

Question 3

statistical hypothesis which the researcher believes to be true

Answer 3

alternative

Question 4

statistic whose value is calculated from sample data

Answer 4

test statistic

Question 5

error committed when we reject the null when the null is true

Answer 5

type 1

Question 6

error committed when we accept the null when the null is false

Answer 6

type 2

Question 7

what error is risked when we reject Ho?

Answer 7

Type 1

Question 8

what error is risked when we fail to reject Ho?

Answer 8

Type 2

Question 9

maximum probability of committing a type 1 error that the researcher is willing to commit

Answer 9

level of significance

Question 10

TRUE OR FALSE

If we set the level of significance, we can reduce the probability of committing a Type 2 error by using a larger sample size, n

Answer 10

TRUE

Question 11

probability of selecting a sample whose computed value for the test statistic is equal to or more extreme than the realized value computed from the sample data

Answer 11

p-value

Question 12

Do we reject or no

if p-value is greater than alpha

Answer 12

we do not reject the null hypothesis

Question 13

Do we reject or no

if p-value is smaller than alpha

Answer 13

we reject the null hypothesis