Question 1

The independent samples t-test for means always compares mean scores for the________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ variable measured in two groups.

Accepted Answer

The answer of The independent samples t-test for means always...

Question 2

Regression coefficients represent the______________in the outcome variable per unit change in the associated predictor variable, holding all other predictor variables constant.

Accepted Answer

The answer of Regression coefficients represent the______________in the outcome variable...

Question 3

A simple regression is a statistical technique used to derive an equation that relates a single continuous dependent variable to two or more independent variables.

Accepted Answer

A simple regression involves one dependent variable and one independent variable, not multiple independent variables. Multiple regression involves two or more independent variables.

Question 4

The simple regression technique in SPSS, not the researcher, specifies which variable should be the independent variable and which one should be the dependent variable.

Accepted Answer

In SPSS, the researcher specifies which variable is the independent variable and which is the dependent variable when setting up a simple regression analysis.

Question 5

A(n)______________is used to derive an equation that relates a single continuous dependent variable to two or more independent variables.

Accepted Answer

The answer of A(n)______________is used to derive an equation that...

Question 6

Percentages are always calculated in the direction of the causal variable.

Accepted Answer

Percentages are calculated by dividing the effect variable by the causal variable, so the direction of the calculation is always from the causal variable to the effect variable.

Question 7

A statistic used to measure the strength of relationship between categorical variables is called a(n)
____________________.

Accepted Answer

The answer of A statistic used to measure the strength...

Question 8

All other variables held constant, a 95% confidence interval will give us a narrower range than will a 99% confidence interval.

Accepted Answer

A 95% confidence interval is narrower because it requires less certainty, allowing for a smaller range of values compared to a 99% confidence interval, which requires more certainty and thus a wider range.

Question 9

Correlation analysis, along with other mathematical procedures, can be used to establish causality.

Accepted Answer

Correlation analysis alone cannot establish causality; it only indicates a relationship between variables. Establishing causality requires controlled experiments or additional methods like randomized controlled trials to rule out confounding factors.

Question 10

Cross tabulation work equally well with continuous measures that have been recast as categorical measures.

Accepted Answer

Cross tabulation is designed to analyze categorical data, so continuous measures need to be converted into categories to be effectively used in cross tabulation.

Question 11

In a regression analysis, determining the statistical significance of the slope involves the use of the t-statistic.

Accepted Answer

The t-statistic is used to test the null hypothesis that the slope is equal to zero, indicating no relationship between the independent and dependent variables.

Question 12

The error term in the regression model represents all factors that determine criterion variable that are not part of the model.

Accepted Answer

The error term accounts for the influence of all variables not included in the model that affect the dependent variable.

Question 13

The coefficient of determination represents the relative proportion of the total variation in the outcome variable that can be accounted for by the predictor variable in the regression.

Accepted Answer

The coefficient of determination, often denoted as R², measures the proportion of the variance in the dependent variable that is predictable from the independent variable(s) in a regression model.

Question 14

The magnitude of the Pearson correlation coefficient indicates the direction of association, while its sign indicates the strength of the association.

Accepted Answer

The magnitude of the Pearson correlation coefficient indicates the strength of the association, while its sign indicates the direction of the association.

Question 15

A factorial design is an ANOVA analysis that includes two or more dependent variables.

Accepted Answer

A factorial design is an experimental setup that involves two or more independent variables, not dependent variables, and examines their effects on a dependent variable.

Question 16

A statistic used to measure the strength of relationship between categorical variables is called a Cramer's V.

Accepted Answer

Cramer's V is a statistic used to measure the strength of association between two nominal categorical variables, based on the chi-squared statistic.

Question 17

Regression is a robust analytical tool that can also be used when one or more______________variables are categorical as opposed to continuous variables.

Accepted Answer

The answer of Regression is a robust analytical tool that...

Question 18

A toy storeowner hypothesizes, at the 95% level of confidence, that parents spend less than $100 on toys per visit to her store. A sample is taken and the hypothesis test shows a z value of -1.65. We accept the hypothesis:

Accepted Answer

The z-value is negative, which means that the sample mean is less than the hypothesized mean. This supports the hypothesis that parents spend less than $100 on toys per visit to the store.

Question 19

A statistical technique used with a continuous dependent variable and one or more categorical independent variables______________is called a(n) _.

Accepted Answer

The answer of A statistical technique used with a continuous...

Question 20

While the chi-square test indicates whether two variables are independent, it doesn't measure the
____________________ when they are dependent.

Accepted Answer

The answer of While the chi-square test indicates whether two...

Quiz 18: Analysis and Interpretation Multiple Variables Simultaneously