Exam 15: Quantitative Data Analysis: Hypothesis Testing

Multiple regression analysis measures the effect of an independent variable on the dependent variable,while the other independent variables are held constant.

Multicollinearity can be verified by a correlation matrix.

VIF = 1 divided by the tolerance.

Regression analysis is used when the independent variable is nominal or ordinal in nature.

A researcher estimates his model by means of regression.He finds a significance level of .0012 and an R-square of .31 for the model.Which conclusion can the researcher draw from these data?

Which test could best be used to test the hypothesis that students that for a certain course attended tutorials from lecturer X are happier (measured on interval-level)than students who attended tutorials from lecturer Y and Z?

To be able to conduct a t-test it is important:

Multiple regression analysis can only be used when variables are measured by more than one item.

A researcher is interested in whether customer loyalty (measured on a 5-point Likert scale)of people with a bonus card differs from loyalty of people without a bonus card.To test this he can make use of:

The objective of regression analysis is to explain a dependent variable based on 1 or more independent variables.

Which test could best be used to test the hypothesis that the quality of tangible elements (measured on ratio-level)influences satisfaction on the University restaurant (measured on ration-level),but that the relationship between these variables differs between students and faculty?

A researcher wants to know if the distribution of income in his sample corresponds to the real distribution in his population (60% < the standard,40% >= above the standard).Which of the following tests could he use for this?

To determine the F-ratio,the variance between groups ('between-groups mean square')is divided by the variance within groups ('within-groups mean square').

When you want to test if the average score of an exam significantly differs from 7.3 (the average score of last year),an independent samples t-test is most appropriate.

Which test could best be used to test the hypothesis that the average price that people are willing to pay for a meal at the University restaurant differs between Dutch,German and Chinese students?

ANOVA is used to determine if a non-metric variable influences a metric variable.

Which test could best be used to test the hypothesis that the performance of employees depends on the reward they receive,because this reward increases their motivation (all variables are measured on a 5-point Likert scale)?

A researcher want to test if a cause-effect relationships exists between someone's age and the number of hours of sleep someone needs.She measures age as follows: 0 < 20 years. 0 20 - 50 years. 0 > 50 years. Furthermore,participant of the research can fill in the number of hours they sleep on average in a day on a dotted line. Which test could best be used to test the hypothesis that age influences the number of hours someone sleeps?

A Sobel-test is often used when moderation is tested.

The statistical null hypothesis is rejected when the p-value is small enough.