A must-have reference resource for qualitative management researchers, this dictionary contains over 90 entries covering the fundamentals of qualitative methodologies; covering both analysis and implementation. Each entry gives an introduction to the topic, lists the key relevant features, gives a worked example, a concise summary and a selection of further reading suggestions. It is suitable for researchers and academics who need a handy and quick point of reference.
Parametric tests provide inferences for making statements about the means of parent populations. A t-test is commonly used for this purpose. This test is based on the Student's t-statistic. The t-statistic assumes that the variable is normally distributed and the mean is known (or assumed to be known) and the population variance is estimated from the sample. Assume that the random variable X is normally distributed, with mean μ and unknown population variance σ2, which is estimated by the sample variance s2. Recall that the standard deviation of the sample mean, , is estimated as . Then is t distributed with n – 1 degrees for freedom.
The t-distribution is similar to the normal distribution in appearance. Both distributions are bell-shaped and symmetric. ...