T-tests and z-tests
Not what you're looking for?
How many variables are in a Z and T test? What are they? What are their levels of measurement?
What is the underlying difference between the T-test and the Z-test?
Provide an example of nominal information and write a work related survey question that would collect nominal data:
Purchase this Solution
Solution Summary
Explains z and t tests and their underlying differences. Also gives an example of a survey question that would collect nominal data.
Solution Preview
A.
A z test is typically used to compare a single sample to a population on a single variable. For example, you could use a z test to test whether a group of people are overweight relative to the rest of the population. A z test can also be used to determine whether a single individual's score is typical in a population. For example, if you took an IQ test, your performance on the test may be described in terms of a z score. Again, this would be done for a single variable (IQ). Z tests can handle a variety of different variables, but they must be measured on a continuous, interval or ratio scale of measurement.
A t test can be used to compare the following: a single sample to a population, two samples, or paired scores (for example, if you wanted to compare pre- ...
Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.