Technically only you can actually answer your objectives as others will only offer opinion.
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The answer is generally no. I note there is no hard and fast definition of the field of statistics. The definition of the field or discipline of statistics is not to reduce the number of values in the set of collected data. An objective of statistics is to characterize or add meaning to the collected data, through calculated values of the data. In this sense, statistics summarizes the data.
Whether or not the student passes depends on the level of the examinations, the effort put in by the student, the quality of his teachers. There are too many contributory factors for a simple answer.
The Student's T- Distribution is a type of probability distribution that is theoretical and resembles a normal distribution. The Student T- Distribution differs from the normal distribution by its degrees of freedom.
Inferential statistics uses data from a small group to make generalizations or inferences about a larger group of people. Inferential statistics should be used with "inferences".
The answer your looking for is Convenience, because it was convenient for the student to interview his class.