Question 1

In hypothesis testing, the probability of rejecting H₀ when H₀ is true is denoted by which one of the following? A) α B) 1 - α C) β D) 1 - β

Accepted Answer

Rejecting H₀when H₀is true is a Type I error, also known as alpha

Question 2

In hypothesis testing, the probability of failing to reject H₀ when H₀ is true is denoted by which one of the following? A) α B) 1 - α C) β D) 1 - β

Accepted Answer

Failing to reject H₀when H₀is true is a correct decision, computed as one minus alpha

Question 3

The probability of making a Type I error when rejecting H₀ when H₀ is true, at a significance level of .10, is which one of the following? A) 0% B) 5% C) 10% D) 100%

Accepted Answer

The probability of making a Type I error, which is rejecting H₀when H₀is true, is alpha. In this case, alpha is .10 so the probability is 10%.

Question 4

Which one of the following is an assumption of the independent t test?
A) equal sample sizes
B) independence
C) linearity
D) muticollinearity

Accepted Answer

Assumptions of the independent t test include independence, normality, and homogeneity of variance.

Question 5

The number of hours elite athletes spent training per week was measured immediately before competition and immediately after. To determine if the mean number of hours differs before versus after competition, which statistical test would be generated?
A) independent t test
B) dependent t test
C) simple regression
D) z test

Accepted Answer

In this case, cases have been measured pre and post, reflecting paired samples or dependent t test

Question 6

A researcher wants to determine if time in incarceration can be predicted by family home income. Which statistical test would be generated to answer this question?
A) independent t test
B) dependent t test
C) simple regression
D) two-factor ANOVA

Accepted Answer

This is a prediction model with one dependent variable (time in incarceration) and one independent variable (family home income), thus simple regression is appropriate.

Question 7

An increase of one point on the independent variable results in an increase of some value on the dependent variable. Which statistic is reflected in this statistic?
A) criterion
B) independent variable
C) intercept
D) slope

Accepted Answer

The sample slope is referred to alternately as (a) the expected or predicted change in Y for a one-unit change in X, and (b) the unstandardized or raw regression coefficient.

Question 8

A value of +.75 indicates which type of relationship?
A) negative
B) positive
C) neutral

Accepted Answer

Positive values indicate positive relationships.

Question 9

A researcher has collected data on two categorical independent variables and one continuous dependent variable. If they are interested in using all the variables in one model, which one of the following statistical procedures is their only option?
A) independent t test
B) dependent t test
C) simple regression
D) two-factor ANOVA

Accepted Answer

Of the procedures listed, only the two-factor ANOVA can accommodate two categorical independent variables and one continuous dependent variable

Quiz 2: Univariate and Bivariate Statistics Review

In hypothesis testing, the probability of rejecting H0 when H0 is true is denoted by which one of the following?

In hypothesis testing, the probability of failing to reject H0 when H0 is true is denoted by which one of the following?

The probability of making a Type I error when rejecting H0 when H0 is true, at a significance level of .10, is which one of the following?

Which one of the following is an assumption of the independent t test?

The number of hours elite athletes spent training per week was measured immediately before competition and immediately after. To determine if the mean number of hours differs before versus after competition, which statistical test would be generated?

A researcher wants to determine if time in incarceration can be predicted by family home income. Which statistical test would be generated to answer this question?

An increase of one point on the independent variable results in an increase of some value on the dependent variable. Which statistic is reflected in this statistic?

A value of +.75 indicates which type of relationship?

A researcher has collected data on two categorical independent variables and one continuous dependent variable. If they are interested in using all the variables in one model, which one of the following statistical procedures is their only option?

In hypothesis testing, the probability of rejecting H₀ when H₀ is true is denoted by which one of the following?

In hypothesis testing, the probability of failing to reject H₀ when H₀ is true is denoted by which one of the following?

The probability of making a Type I error when rejecting H₀ when H₀ is true, at a significance level of .10, is which one of the following?