Mock Exams Applied Statistics

A dependent variable…

• Measures the proposed effect.

• Measures the proposed cause.

• Is also called an endogenous variable.

• Is also called an outcome variable.

Which of the following research questions are subject to confirmatory research?

• How does a price change affect different aspects of purchase behaviour?

• Which customers have the highest share of wallet per month?

• What variables affect customer satisfaction?

• Does the new ad lead to more purchases than the old ad?

Which of the following statements on the null hypothesis are true?

• The null hypothesis generally states that an effect is absent.

• If we reject the null hypothesis, we have statistical support for the alternative hypothesis.

• If we fail to reject the null hypothesis, it is proof for the null hypothesis to be true.

• A statistical test measures the likelihood of obtaining the data, if the null hypothesis were hypothetically true.

For a market analysis, a consulting company has tracked the quarterly sales figures of the biggest US sneaker brands over the last five years.

Which statements about this data collection process are true?

• The company collected qualitative data.

• The company conducted a longitudinal study.

• The company conducted an experimental study.

• The company engaged in exploratory research.

Which of the following variables are manifest?

• Intelligence (measured by an IQ test)

• Heart rate (measured by beats per minute)

• Temperature (measured in degrees Celsius)

• Income (measured in CHF per year)

Which of the following variable types are continuous variables?

• Discrete variables

• Interval variables

• Binary variables

• Nominal variables

Which of the following statements are true about this sequence:

3, 3, 4, 5, 6, 6, 7, 8

• The median is bigger than the mean.

• The median is smaller than the mean.

• The median equals the mean.

• The sequence is bimodal.

What does the following line of code do?

myData[1:3,]

• It creates a new data table and saves it as a new object in the environment.

• It divides the first column of the data table myData by its third column.

• It orders the data table myData according to the values in its first three columns.

• It selects the first three rows of the data table myData.