Chapter 1

An Introduction to Psychological Statistics · 9 exercises

Problem 1

In your own words, describe why we study statistics.

4 step solution

Problem 2

For each of the following, determine if the variable is continuous or discrete: a. Time taken to read a book chapter b. Favorite food c. Cognitive ability d. Temperature e. Letter grade received in a class

6 step solution

Problem 3

For each of the following, determine the level of measurement: a. T-shirt size b. Time taken to run 100 meter race c. First, second, and third place in 100 meter race d. Birthplace e. Temperature in Celsius

9 step solution

Problem 4

What is the difference between a population and a sample? Which is described by a parameter and which is described by a statistic?

4 step solution

Problem 5

What is sampling bias? What is sampling error?

4 step solution

Problem 6

What is the difference between a simple random sample and a stratified random sample?

4 step solution

Problem 7

What are the two key characteristics of a true experimental design?

3 step solution

Problem 8

When would we use a quasi-experimental design?

5 step solution

Problem 10

What are the most common measures of central tendency and spread?

3 step solution

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