| 释义 |
t-test
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. t-test
t-test any in a class of statistical tests used to find the difference between the means of either a sample and a population, two different sample groups, two matched samples, or the same sample at two different points in time.t test A statistical test used to compare the means of two groups of test data.t-test Student's t-test, see there. t-test (statistics) a test of SIGNIFICANCE that enables the means of two small samples (less than 30) to be compared, in order to assess if they came from the same population or from populations with different means. |