Week 1 DQ 1 (version 2)
Week 1 DQ 1 (version 2)
CSU - Dominguez hills
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This 2 page Study Guide was uploaded by smartwriter Notetaker on Sunday November 15, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 17 views.
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Date Created: 11/15/15
Class, DQ1 Due Day 2 (Wednesday) Respond by clicking on Reply. Explain the difference between a lefttailed, twotailed, and righttailed test. When would we choose a twotailed test? How can we tell the direction of the test by looking at a pair of hypothesis? How can we tell which direction (or no direction) to make the hypothesis by looking at the problem statement (research question)? Provide a simple explanation that is easy to understand. You may summarize referenced information but I want your own words. Discussion questions should show evidence of critical thinking. Each one should be at least 150 words or more. Be sure to cite any reference you might use. A left tailed test is when you use the significance level to find the cutoff score at the left of the distribution, a right tailed test is when you use the significance level to find the cutoff score at the right of the distribution and the 2 tailed test is when you use the sig. level to find the cutoff score at both ends. We use the different types of tests when we have to do research on certain products that if they are selling in the range we want them to or not. You would use a two tailed test when you are comparing 2 paired groups. Often times they are used when doing quality inspection. They don’t want the height of something to exceed this limit, but neither goes under this limit. The direction can be told by the wording, like the key words are: Lesser than (or equal too) Greater than (or equal too) Fewer than (or equal too) More than (or equal too) And more Often times where there are 2 groups we are trying to compare. For example, if we want to see if students in math majors are smarter than students in biology majors, or conclusion would be only that either math students are smarter or nothing can be decided. This is directional, but if they said that are math majors smarter than students in biology majors and the other way around, then we would use a two tailed test.
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