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.
Distribution of the Sample Mean. This result follows from the fact that any linear combination of independent normal random variables is also normally distributed. This means that for two independent normal random variables X and Y and any constants a and b, aX + bY will be normally distributed. In the case of the sample mean, the linear combination is = (1/n)*(X1 + X2 + ... Xn) . For example, consider the distributions of yearly average test scores on a national test in two areas of the country. In the first area, the test score X is normally distributed with mean 70 and standard deviation 5.