Which explanations are justified based on the evidence you obtained? Check all that apply.

A sample mean of 3.70 does not have to equal the population mean of 3.53; samples vary, so this difference could be due to sampling variability. It is also possible that the administrator’s claimed value is mistaken and the population mean is greater than 3.53. The sample mean alone does not prove the population mean is greater, nor does it show that either value is impossible.

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