Testing of Hypothesis

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Answer of part A.

If the data is numerical and the distribution it belongs to is normal then parametric test of hypothesis is used. In the parametric tests of hypothesis the t-test is the most commonly used one. T-test is used to compare means of two data sets. The comparison of means of two samples is done to find statically significance in their difference, if exist.

When means are slightly different and the standard deviations are same the appropriate test of hypothesis will be the t test. The t test is further divided into two types namely, ...