Manual Event (Session ID,DateTime,Event) = 9bghk7t4rlo4u2djkttqqmbe57 20210728160735 /courses-for-public/programme-evaluation-and-impact-assessment-2/presurvey/

1

Which of the following statements about hypotheses and null hypotheses is correct?

A

Every hypothesis has an unstated null hypothesis that is always the opposite of the hypothesis.
B

Every hypothesis has an unstated null hypothesis that is always the same as the hypothesis.
C

A null hypothesis is the prediction of a relationship among variables that have an effect on one another.
D

A hypothesis is a default position holding that no relationship exists between the variables being tested and that any observed relationship is due purely to chance.
2

What is true about type I errors?

A

A type I error is usually called “a false negative”.
B

A type I error is usually called “a false positive”.
C

A type I error occurs when you accept a true null hypothesis.
D

A type I error occurs when you reject a false null hypothesis.
3

Suppose that a researcher is testing whether a social robot may be helpful in reducing social isolation among older adults. Which of the following is an example of a type I error?

A

The null hypothesis is not true, but the researcher falsely accepts it.
B

The null hypothesis is true, but the researcher falsely rejects it.
C

The hypothesis is not true, but the researcher falsely accepts it.
D

The hypothesis is true, but the researcher falsely rejects it.
4

What is true about a type II error?

A

A type II error is usually called “a false positive”.
B

A type II error is usually called “a false negative”.
C

A type II error occurs when you accept a true null hypothesis.
D

A type II error occurs when you reject a false null hypothesis.
5

Suppose a researcher is testing whether a social robot may be helpful in reducing social isolation among older adults. Which of the following is an example of a type II error?

A

The null hypothesis is not true, but the researcher falsely accepts it.
B

The null hypothesis is true, but the researcher falsely rejects it.
C

The hypothesis is not true, but the researcher falsely accepts it.
D

The hypothesis is true, but the researcher falsely rejects it.