Difference Between a Left-Tailed, Two-Tailed & Right-Tailed Test
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Explain the difference between a left-tailed, two-tailed, and right-tailed test. When would you choose a two-tailed test? How might you tell the direction of the test by looking at a pair of hypothesis? How might you tell which direction (or no direction) to make the hypothesis by looking at the problem statement (research question)?
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The solution discusses the difference between a left-tailed, two tailed and right-tailed test.
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(a) The three types of statistical tests: left-tailed, two-tailed and right-tailed are used under different situations.
Which test is applied depends upon the hypothesis (claim) in question.
For example a claim such as "The mean salary of the professors of an institution is less than $10000" is a case
for a left-tailed test. Instead, a claim such as "The mean number of years of research experience required to be
conferred a doctorate is more than 10 years" is a case for a ...
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