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In statistics, the t-statistic, or t-value, is a measure that describes the relationship between a sample and its population. The t-statistic is central to the Student's t-test, which is a test for evaluating hypotheses about the population mean. More precisely, the t-statistic is used ...
The row and column intersection in the t-distribution table indicates that the critical t-value is 1.725. Use either the positiveornegative critical value depending on the direction of your t-test. The graphs below illustrate both one-sided tests. Your results are statistically significant if your...
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Table of contentsWhen to use a t-test?Which t-test?How to do a t-test?p-value from t-testt-test critical valuesHow to use our t-test calculatorOne-sample t-testTwo-sample t-testPaired t-testt-test vs Z-testFAQs Welcome to our t-test calculator! Here you can not only easily pe...
To be able to interpret individual t-values, we have to place them in a larger context. T-distributions provide this broader context so we can determine the unusualness of an individual t-value. What Are t-Distributions? A single t-test produces a single t-value. Now, imagine the followi...
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This calculated t-value is then compared against a value obtained from a critical value table called the T-distribution table. Higher values of the t-score indicate that a large difference exists between the two sample sets. The smaller the t-value, the more similarity exists between the two...
It's a good practice to make this decision before collecting the data and before calculating test statistics. We calculate a test statistic. Our test statistic is 0.750. We find the value from the t-distribution. Most statistics books have look-up tables for the distribution. You can also ...