Directions: Solve the given problem completely. For each number, satisfy the following: I. Word Problem: The scores of Grade 11 students in an achievement test in mathematics are normally distributed with a mean of 83 and a standard deviation of 8. Suppose that a random sample of size n = 20 is taken from this group of students. Find the following: se. D. Probability that the mean in the sample is Less than 80 At least 87

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