Explore BrainMass

Explore BrainMass

    Two-Tailed Test

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    How to decide whether your test should be one-tailed or two-tailed/directional or non-directional. Gives an example of each type, with an explanation of why it is/is not directional.

    © BrainMass Inc. brainmass.com March 4, 2021, 6:00 pm ad1c9bdddf
    https://brainmass.com/statistics/hypothesis-testing/whether-test-should-tailed-23568

    Solution Preview

    A two-tailed (non-directional) test tests only whether there is a difference between two or more groups/samples/means. A one-tailed (directional) test also tests for differences between groups/samples/means, but it tests for a directional difference between them (ie. whether one is bigger/smaller than another).

    Example 1.
    The mean grade in last year's Introductory Statistics class was 72, with a standard deviation of 6.2. This year, a new professor taught the course, and the mean grade was 81, ...

    Solution Summary

    How to decide whether your test should be one-tailed or two-tailed/directional or non-directional. Gives an example of each type, with an explanation of why it is/is not directional.

    $2.49

    ADVERTISEMENT