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Classification of Data: Categorical and Numerical

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Classification of Data: Categorical and Numerical

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Questions and Answers

What is the branch of statistics that involves generalizing from a sample to the population and assessing the reliability of such generalizations?

Inferential statistics (correct)

Population statistics

Descriptive statistics

Sample statistics

What is the definition of statistics?

Branch of physics dealing with motion and energy

Branch of science dealing with collection and interpretation of data (correct)

Branch of mathematics dealing with shapes and sizes

Branch of biology dealing with organisms and ecosystems

Which field does the text mention as an example of the application of statistics?

History

Sociology

Astronomy

Public choices/responses (correct)

What is the main purpose of descriptive statistics?

To summarize and describe data Signup and view all the answers

What is the key difference between categorical and numerical data?

Categorical data consists of categorical responses, while numerical data is expressed as numbers. Signup and view all the answers

What distinguishes discrete data from continuous data?

Discrete data has possible values that correspond to isolated points on the number line, while continuous data has possible values that correspond to all points inside an interval on the number line. Signup and view all the answers

What does univariate data refer to?

Data set that consists of observations on a single variable. Signup and view all the answers

Why is measurement important in statistics?

Measurement determines the appropriate statistical method/s for analyzing a data set. Signup and view all the answers

What technique ensures that the experiment does not systematically favor one experimental condition over another?

Random assignment Signup and view all the answers

Which technique involves using extraneous variables to create groups (blocks) that are similar?

Blocking Signup and view all the answers

Which technique involves holding extraneous variables constant so that their effects are not confounded with those of the experimental conditions?

Direct control Signup and view all the answers

Which technique ensures that there is an adequate number of observations for each experimental condition magnitude?

Replication Signup and view all the answers

What is the difference between uncertainty and variability?

Uncertainty occurs when the true value of a quantity at a single instance is unknown, while variability occurs when the quantity is measured at multiple instances with considerable differences. Signup and view all the answers

Why might assumptions need to be made in the understanding of physical phenomena?

To simplify the understanding of reality Signup and view all the answers

What is an example of epistemic uncertainty mentioned in the text?

Measurement of beam deflections Signup and view all the answers

Why is a careful plan needed for collecting new data according to the text?

To understand and address any resulting limitations fully Signup and view all the answers