Quiz about Hypothesis Testing

Question 1

The following are methods used to test hypotheses except:

Accepted Answer

survey method

Answer

traditional (computed value) method

Answer

p-value method

Answer

confidence interval method

Question 2

What hypothesis states equality or no difference, or no relationship/effect?

Accepted Answer

null hypothesis

Answer

statistical hypothesis

Answer

alternative hypothesis

Question 3

What hypothesis states no equality or existence of differences, relationship, or effect?

Accepted Answer

alternative hypothesis

Answer

statistical hypothesis

Answer

null hypothesis

Question 4

Which hypothesis is generally formulated to look for evidence to support a claim called a research hypothesis?

Accepted Answer

alternative hypothesis

Answer

statistical hypothesis

Answer

null hypothesis

Question 5

In reality, the null hypothesis may or may not be true, and a decision is made to reject or not to reject it on the basis of the data obtained from a sample.

Accepted Answer

True

Answer

False

Question 6

The level of significance is the maximum probability of committing a type II error.

Accepted Answer

False

Answer

True

Question 7

A level of significance of 5% means:

Accepted Answer

There's a 5% chance we'll be wrong if we reject the null hypothesis.

Answer

There's a 5% chance we're wrong

Answer

There's a 5% chance we'll be wrong if we fail to reject the null hypothesis

Answer

There's a 5% chance you'll get an A on the test.

Question 8

Which value separates the critical region from the noncritical region in a normal curve when testing the hypothesis?

Accepted Answer

critical value

Answer

computed value

Answer

t-value

Answer

z-value

Question 9

A Type I error is when:

Accepted Answer

We reject the null hypothesis when it is actually true

Answer

We obtain the wrong test statistic

Answer

We fail to reject the null hypothesis when it's actually false

Answer

We reject the alternate hypothesis when it's actually true

Question 10

We conclude "Fail to reject H₀". What could we use as our interpretation?

Accepted Answer

There is not enough evidence to say that the proportion of babies born male is different from 0.50.

Answer

The proportion of babies born male is not 0.50.

Answer

There is not enough evidence to say that the proportion of babies born male is 0.50.

Question 11

A level of significance of 5% means:

Accepted Answer

There's a 5% chance we'll be wrong if we reject the null hypothesis.

Answer

There's a 5% chance we're wrong

Answer

There's a 5% chance we'll be wrong if we fail to reject the null hypothesis

Answer

There's a 5% chance you'll get an A on the test.

Question 12

A result was said to be significant at the 5% level. This means:

Accepted Answer

the result would be unexpected if the null hypothesis were true

Answer

the null hypothesis is probably wrong

Answer

the null hypothesis is probably true

Answer

none of the above

Question 13

What does it mean to say a test is two-tailed?

Accepted Answer

There is no predicted direction for the alternative hypothesis

Answer

There are two alternative hypotheses

Answer

There are two types of error

Question 14

Failing to reject a null hypothesis that is false can be characterized as

Accepted Answer

a Type II error

Answer

a Type I error

Answer

both a Type I and Type II error

Answer

<span>no error</span>

Question 15

A Type I error is when:

Accepted Answer

We reject the null hypothesis when it is actually true

Answer

We obtain the wrong test statistic

Answer

We fail to reject the null hypothesis when it's actually false

Answer

We reject the alternate hypothesis when it's actually true

Question 16

A P-value indicates:

Accepted Answer

the probability of obtaining the results (or one more extreme) if the null hypothesis is true

Answer

the probability that the null hypothesis is true

Answer

the probability that the alternative hypothesis is true

Answer

probability of a Type I error

Question 17

What separates the critical region from the noncritical region?

Accepted Answer

critical value

Answer

computed value

Answer

z-score

Question 18

Type I error is also called

Accepted Answer

alpha error

Answer

beta error

Answer

critical value error

Question 19

Which of the following yields correct decision?

Accepted Answer

Accept a true null hypothesis

Answer

Accept a false null hypothesis

Answer

Reject a true null hypothesis

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