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Week 3 Discussion 1

Explain the difference between a one-tailed and two-tailed t-test using your own words. Validate your explanation by citing credible expert sources (textbooks, peer-reviewed journal articles, etc.).

State two research hypotheses that can be tested using a one-tailed t-test, and discuss why a one-tailed t-test would be appropriate for those hypotheses.

State two research hypotheses that can be tested using a two-tailed t-test, and discuss why a two-tailed t-test would be appropriate for those hypotheses.

Assessing Central Tendency and Descriptive Statistics

Examine a research article which incorporates a measure of central tendency and descriptive statistics. Briefly summarize and report the measure of central tendency and discuss whether the assumptions of the statistics were met and if the type of data (levels of measurement) was appropriate for the statistical test. Include the following in your paper:

• Description of the measure of central tendency you intend to examine in the article
• Brief description of the study portrayed in the article
• Description of how the central tendency measure was used in the study
• Explanation of how this is appropriate or inappropriate
• Explanation of how assumptions of the central tendency measure were met or not met
• Identification of the levels of measurement of variables in the study
• Description of the appropriateness of the levels of measurement of the study variables
• Discussion of how the data was displayed (i.e., graphs, tables)
• Discussion examining the appropriateness of the data displays (Strengths and weaknesses? Were they appropriate? Why or why not?)

• 5-9 pages, excluding cover page;
• include references ;
• be composed using Microsoft ® Word ®; and
• must be typed in Times New Roman, font size 12.

This and all papers should be written in APA format and follow standard rules of grammar and formatting.

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