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Statistics students frequently confuse obtaining information on a population vs information on a sample. Suppose you are a researcher interested in studying one aspect of childhood obesity. You decide to look at the BMI of fifth grade boys in the U.S. in 2014. You will eventually compare your results to those from previous years. Discuss the difference between the population for your study and a possible sample. Explain, for average BMI, the difference between the population parameter and the sample statistic.

Consider you are still researching the BMI of U.S. fifth grade boys in 2014. You have obtained a sample of 300 BMI values; explain what descriptive statistics you might calculate for this sample.

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