t-test


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t-test

[′tē‚test]
(statistics)
A statistical test involving means of normal populations with unknown standard deviations; small samples are used, based on a variable t equal to the difference between the mean of the sample and the mean of the population divided by a result obtained by dividing the standard deviation of the sample by the square root of the number of individuals in the sample.
References in periodicals archive ?
Using the total intravesical onabotulinum toxin A patient cohort, a paired t-test (mean NBSS domain score at baseline compared to mean NBSS domain score follow-up), standardized effect size (SES), and standardized response mean (SRM) was calculated.
Student's t-test was used for comparison of mean values.
The Independent Samples T-test was run in order to clearly compare the research data and to analyze whether the differences between the mean percentage of identity sub-types were meaningful or not.
It is used in post hoc comparisons and is not really a t-test.
Table 3 shows the two-sample t-test for the volume of ash residue of coconut leaf midrib charcoal performed in Minitab.
The two-sample t-test (also called independent samples t-test) and the paired t-test are probably the most widely used tests in statistics for the comparison of mean values between two samples.
Since these authors report both ANOVA and t-test results for some of the same comparisons, I would like to explain why this is possible.
The hematological parameters like count RBC, WBC, count concentration Hb and PCV of anti-coagulated blood sample analysis were found adversely effected in flock 2 gradually shown in Table 1 on the basis of statistical significance of two-tailed p values calculated by the application of unpaired t-test.
As an example considered in our paper is the adequacy of the Student's t-test for testing hypotheses in the educational researches.
The difference between the two income levels is found statistically significant on the basis of paired t-test (Table 1).
Data analysis: Chi-square and Student t-test were performed to examine the difference in sex ratio.