Statistics and Data Analysis Quiz

What is statistics?

• The study of descriptive language

• The science of collecting, organizing, presenting, analyzing, and interpreting quantitative data

• The process of estimating numerical patterns

• A method of transforming numerical data

What does data analysis involve?

• Writing reports about trends

• Developing surveys for decision making

• Inspecting, cleaning, transforming, and modeling data

• Collecting numerical information

What is an outlier in a dataset?

• A common value within a dataset

• An observation that lies abnormally far from other values

• The highest number in the dataset

• A randomly selected value

What does skewness measure in a dataset?

• The central tendency of data

• How data points are distributed

• The peak of a frequency distribution

• The sum of all data values

What is kurtosis?

• A method of data cleaning

• A statistical measure describing how scores cluster in the tails or peak of a frequency distribution

• A process of ranking data

• A measure of data spread

What is reverse coding in surveys?

• Changing numbers to letters for classification

• Rephrasing positive questions in a negative way to ensure consistent responses

• Ranking responses in descending order

• Removing irrelevant responses

Which type of data is used only for labeling or categorization?

• Ratio

• Interval

• Ordinal

• Nominal

What type of data involves rank ordering but does not indicate how much more or less one category is from another?

• Nominal

• Ordinal

• Interval

• Ratio

Which level of data does not have an absolute zero point?

• Ratio

• Interval

• Ordinal

• Nominal

What is the highest level of data?

• Ratio

• Interval

• Ordinal

• Nominal