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If the paired differences are normal in a test of mean differences, then the distribution used for testing is the
we prefer normal distribution over other distribution in statistics because most of the data around us is continuous. So, for continuous data normal distribution is used.
It may not be better, but there is a lot of information on the normal distribution. It is one of the most widely used in statistics.
No, the normal distribution is strictly unimodal.
Yes. When we refer to the normal distribution, we are referring to a probability distribution. When we specify the equation of a continuous distribution, such as the normal distribution, we refer to the equation as a probability density function.