# Lesson 2: Statistics: Benefits, Risks, and Measurements

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### Assignments

• Complete the 'Poll Monday' and 'Thinking Tuesday' Activities for Lesson 2.
• Read Chapters 1 and 3 in the text.
• Work through the Lesson 2 online notes that follow.
• Complete the Practice Questions and Lesson 2 Assignment  (posted in Canvas in the Lesson 2 module).

### Learning Objectives

#### Chapters 1 and 3

After successfully completing this lesson, you should be able to:

• Identify the three conditions needed to conduct a proper study.
• Apply the seven pitfalls that can be encountered when asking questions in a survey.
• Distinguish between measurement variables and categorical variables.
• Distinguish between continuous variables and discrete variables for those that are measurement variables.
• Distinguish between validity, reliability, and bias.

### Terms to Know

#### From Chapter 1

• statistics
• population
• sample
• observational study
• experiment
• nonresponse bias

#### From Chapter 3

• data (variable)
• categorical variables
• measurement variables
• measurement (discrete) variables
• measurement (continuous) variables
• validity
• reliability
• bias