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One- and two-tailed tests


In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter inferred from a ...

One-Tailed Test: Definition - Stat Trek


Definition of one-tailed test, from the Stat Trek dictionary of statistical terms and concepts. This statistics glossary includes definitions of all technical terms used ...

One-Tailed Test Definition | Investopedia


A one-tailed test is a statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both.

One-tailed and two-tailed tests - The Analysis Factor


Tagged as: F test, hypothesis testing, One-tailed test, T test, Two-tailed test, Z test ... I have used a one-tailed test but the effect went into the opposite direction.

Stata | FAQ: One-sided tests for coefficients


The results from estimation commands display only two-sided tests for the coefficients. How can I perform a one-sided test?

Chapter 7: Hypothesis Testing - Kennesaw State University


Ha: m 2.73. A one-tailed test is one where Ha is directional and includes < or >. or ... What is the critical value for a one-tailed test and a 95% level of confidence?

Test of hypothesis (one-tail)


In this circumstance a one-tailed test is employed. The null hypothesis (H0) for a one tailed test is that the mean is greater (or less) than or equal to µ, and the ...

One-tailed and two-tailed tests | Khan Academy


Now if we wanted to do a one-tailed test, but for some reason we already ... If you want to do one-tailed test, you could say that the drug lowers response time.

One Tailed Test or Two in Hypothesis Testing. How to Decide.


Nov 4, 2009 ... How to figure out if you have a one tailed test or two in hypothesis testing. Includes video. Free help forum, online calculators.

Why do we use a one-tailed test F-test in analysis of variance ...


Aug 16, 2013 ... Can you give the reason for using a one tailed test in the analysis of variance test ? Why do we use a one-tail test - the F-test - in ANOVA?

One-Tailed Test
A statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both. If the sample that is being tested falls into the one-sided critical area, the alternative hypo... More »
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FAQ: What are the differences between one-tailed and two-tailed tests


Because the one-tailed test provides more power to detect an effect, you may be tempted to use a one-tailed test whenever you have a hypothesis about the ...

What is a one-tailed test? - PsychWiki - A Collaborative Psychology ...


Nov 18, 2010 ... One tailed test is a test of a directional hypothesis, where we have a ... the statistics book” statistically, the test would be called one-tailed test.

1- vs 2-Tailed Tests


Because we were only interested in one side of the distribution, or one "tail", this type of test is called a one-sided or a one-tailed test. When you are using tables ...