Question

Ul elch measure developed Practice Problem 2-3 le in the text, I demonstrate how a student's grade based on testing could be an In an examp invalid measure of student learning when the materials learned are not covered in the tests. Could you think of any other conditions when a student's grade becomes an invalid measure of student learning? Practice Problem 2-4 What are measurement levels of the following measures? 1. Response time of medical emergency response units (in seconds) 2. Annual income of a resident surveyed (in dollars) 3. Number of crimes per 100,000 residents in cities 4. Percentage of participants successfully completing an alcohol treatment program 5. Individual citizen's satisfaction ratings on municipal services (response categories: satisfied, neutral, not satisfied) 6. Percentage of citizens rating municipal service excellent or very good 7. Individual worker's ratings on the overall quality of the services provided by a job training program (response categories: excellent, good, fair, poor) 8. Number of workers trained

Answer 1

Problem 2-4:

Types of measurement scales are Nominal, Ordinal and Ratio.

Nominal is when there is a category which is not ordered in natural and non-numeric.

Ordinal variable is a variable which can be non-numeric/numeric but it will be ordered in nature.

Ratio scale is a variable which is numeric

1. Response time of medical emergency response units (seconds) - Ratio

2. Annual income of a resident surveyed (in dollars) - Ratio

3. Number of crimes per 100,000 residents in cities - Ratio

4. Percentage of participants successfully completing an alcohol treatment program - Ratio

5. Individual's citizen's satisfaction ratings on municipal services (response categories: Satisfied, neutral, not satisfied) - Ordinal

6. Percentage of citizens rating municipal service excellent or very good - Nominal

7. Individual's workers rating on the overall quality of the services provided by a job training program (response categories: excellent, good, fair, poor) - Ordinal

8. Number of workers trained - Ratio