Exam 15: Quantitative Data Analysis: Hypothesis Testing

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

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?

Multicollinearity implies that the independent variables are highly correlated with each other.

Multicollinearity can be verified by a correlation matrix.

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

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?

ANOVA is used to determine whether the variance between groups significantly differ from each other.

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:

Regression analysis is used when the dependent 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?

An ANOVA conducted on 2 groups essentially is the same as conducting a t-test.

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

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?

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

What is the appropriate method to test if having a mobile phone is related to gender?

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?

Essentially,the relations that are tested through ANOVA could also be tested through regression analysis (by using dummy variables).

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

A possible solution to deal with multicollinearity is to collect more data.

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