When the data is plotted on a graph, it should resemble a bell curve with normal distribution. The second assumption is to pick the sample from the population randomly. It is assumed to be either ordinal or continuous scale. The first assumption would be to assume the scale of measurement. What are the steps to calculate a t-test? Step1: Assumptions Paired t-test: it compares the means of two sample groups taken from the same population, whether they have different characteristics or not.Two-sample unpaired t-test: It compares the means of two different sample groups to derive if their associated population means are drastically different from each other.One-sample t-test: It determines if a population’s mean is different from the hypothesized value.
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