There are 20 crew members at a given university. You want to calculate the probability

There are 20 crew members at a given university. You want to calculate the probability that their mean BMI will be 2 units below the mean BMI for the population. Assume the standard deviation is 5 and the outcome is normally distributed in the population. Hint: you have all of the information you need to calculate the answer to this question. Ask yourself, what is the value of the numerator? If it helps, substitute (made up) numbers for the variables in the numerator based on the information given in the question. a. Which probability model should you apply to this question, and why? b. Calculate the probability.

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