Stat 3000 Test 1 Review

Front

What is a residual?

Back

The difference between the actual value and the predicted value.

Front

What are the steps of the Statistical Investigation Process (SIP)?

Back

1. Pose a statistical question. 2. Collect data. 3. Analyze the data. 4. Draw conclusions.

Front

When should we use percentiles as a measure of spread?

Back

As the data are skewed.

Front

What type of study investigates relationships without intervention?

Back

An observational study.

Front

What is a confounding factor?

Back

A variable associated with both the explanatory and response variables and can explain the relationship between them.

Front

What is the purpose of the Statistical Investigation Process?

Back

To systematically analyze data and draw conclusions.

Front

What is the difference between a controlled experiment and an observational study?

Back

A controlled experiment involves manipulation of variables, while an observational study does not.

Front

What does it mean if data is skewed?

Back

The data is not symmetrically distributed, affecting measures of central tendency.

Front

What is the role of the explanatory variable in a study?

Back

It is the variable that is manipulated or categorized to observe its effect on the response variable.

Front

What is the response variable in a statistical study?

Back

It is the variable that is measured to see how it is affected by the explanatory variable.