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MODULE 3: THE T-TEST (PORTAGE LEARNING STATISTICS CNSL 503, THE T-TEST) QUESTIONS AND ANSWERS 100% CORRECT What is the difference between a parameter and a statistic? A parameter is a numerical value that describes a population, such as the population mean. A statistic is a numerical value that describes a sample, such as a sample mean A statistic is a descriptive statistical result that is generated from a sample, whereas a parameter is a statistical result from a population.. Why is ...