Question 1

What is a type I error?

Accepted Answer

rejecting a null hypothesis when it is actually true

Answer

failing to reject a null hypothesis when it is actually false

Answer

accepting a null hypothesis when it is actually false

Answer

accepting an alternative hypothesis when it is actually false

Question 2

What is the p-value?

Accepted Answer

the probability of obtaining a test statistic at least as extreme as the one observed, assuming the null hypothesis is true

Answer

the probability of a type I error

Answer

the expected value of the test statistic, assuming the null hypothesis is true

Answer

the probability that the null hypothesis is true

Question 3

What is the critical region?

Accepted Answer

the set of all test statistics that would lead to rejection of the null hypothesis at a given significance level

Answer

the set of all possible outcomes

Answer

the set of all test statistics that would lead to acceptance of the null hypothesis at a given significance level

Answer

the set of all test statistics that would lead to either rejection or acceptance of the null hypothesis

Question 4

What is the test statistic?

Accepted Answer

a calculated value that represents the number of standard deviations a sample mean is from the null hypothesis mean

Answer

a calculated value that represents the size of the sample

Answer

a calculated value that represents the probability of the null hypothesis being true

Answer

a calculated value that represents the number of standard deviations the null hypothesis is from the sample mean

Question 5

What is a two-tailed test?

Accepted Answer

a test in which the alternative hypothesis specifies a difference between the populations or samples but does not specify a greater than or less than relationship

Answer

a test in which the alternative hypothesis specifies either a greater than or less than relationship between the populations or samples

Answer

a test in which the null hypothesis is rejected

Answer

a test in which there is no alternative hypothesis

Question 6

What is a one-tailed test?

Accepted Answer

a test in which the alternative hypothesis specifies either a greater than or less than relationship between the populations or samples

Answer

a test in which the null hypothesis is rejected

Answer

a test in which the alternative hypothesis specifies an equal relationship between the populations or samples

Answer

a test in which there is no alternative hypothesis

Question 7

What is the significance level?

Accepted Answer

the probability of making a type I error

Answer

the p-value

Answer

the probability of making a type II error

Answer

the probability that the null hypothesis is true

Question 8

What is a null hypothesis?

Accepted Answer

a statement that there is no significant difference between specified populations or samples

Answer

a statement that there is no difference between any populations or samples

Answer

a statement that there is a significant difference between specified populations or samples

Answer

a statement that there is no correlation between variables

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