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Assume grades in a course follow a normal distribution the

Assume grades in a course follow a normal distribution. The average grade in a class is 75, and the standard deviation is 5 points. A professor takes a sample of 10 people in the class and calculates the average for that class is also 75. IN other words, the average grade of the sample is the experiment.

What is the probability of getting an average of less than 75 from any sample?

Z score for 75 = = 0

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