Psyllium is a form of fiber made from the Plantago ovata plant, specifically from the husks of the plantâs seed.It sometimes goes by the name ispaghula. Itâs most commonly known as a laxative. Psyllium provides more benefits to your body than decreasing the amount of time you spend in the bathroom.syllium is a form of fiber made from the Plantago ovata plant, specifically from the husks of the plantâs seed.
Independent Samples t Test. The Independent Samples t Test compares the means of two independent groups in order to determine whether there is statistical evidence that the associated population means are significantly different. The Independent Samples t Test is a parametric test.he calculated t value is then compared to the critical t value from the t distribution table with degrees of freedom df = n 1 + n 2 - 2 and chosen confidence level. If the calculated t t value, then we reject the null hypothesis. Note that this form of the independent samples T test statistic assumes equal variances.
where is the sample mean, s is the sample standard deviation of the sample and n is the sample size. The degrees of freedom used in this test are n â 1. Although the parent population does not need to be normally distributed, the distribution of the population of sample means, , is assumed to be normal.e want to test the null hypothesis that the slope Î² is equal to some specified value Î² 0 (often taken to be 0, in which case the null hypothesis is that x and y are independent). Let. Then. has a t-distribution with n â 2 degrees of freedom if the null hypothesis is true.