Suppose you were interested in knowing the mean score for a certain test in a mathematics class

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Suppose you were interested in knowing the mean score for a certain test in a mathematics class with 20 students. You sample four members of the class and find their test scores to be \(49,56,72\), and 96 . The instructor reports that the mean was 72, but you are not sure that is truthful. List the four possibilities and categorize the conclusions including the types of possible errors.

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