PSY315 Week 1

PSY315 Week 1

University of Phoenix Material

Week 1 Practice Worksheet

Provide a response to the following questions. Written responses should be at least 30 to 45 words each.

1. Explain and provide an example for each of the following types of variables:

a. Nominal: Nominal variables have two or more categories without having any kind of natural order. they are variables with no numeric value. Example, gender, male and female or dog lover and cat lover

b. Ordinal: An ordinal variable is a categorical variable for which the possible values are ordered. Ordinal variables can be considered “in between” categorical and quantitative variables.
Example: Educational level might be categorized as
    1: Elementary school education
    2: High school graduate
    3: Some college
    4: College graduate
    5: Graduate degree
While we are measuring education level, there is no set number between each category.

c. Interval: A interval variable is a measurement where the difference between two values is meaningful. Example, temperature measured in degrees Celsius or Fahrenheit, whereas the difference between 30C and 40C is the same as 70C and 80C.

d. Ratio scale: A ratio scale is an interval scale in which distances are stated with respect to a rational zero rather than with respect to, for example, the mean.  Examples of ratio variables include height, mass, & distance. So, for example, a distance of ten meters is twice the distance of 5 meters.

e. Continuous: A continuous variable is a variable that has an infinite number of possible values. In other words, any value is possible for the variable. A discrete random variable X has a countable number of possible values. Example: Let X represent the sum of two dice.

f. Discrete: Variables that can only take on a finite number of values. All qualitative variables are discrete.  For example, responses to a five-point rating scale can only take on the values 1, 2, 3, 4, and 5. The variable cannot have...

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