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1. For sample with standard deviation of 10, a score of X = 44 corresponds to z-score of 0.50. Based on this info, find out the sample mean?

2. Which of following exam scores must lead to the better grade? Describe your answer.

A. A score of X = 55 on an exam that has a mean of 60 and a standard deviation of 5.

B. A score of X = 40 on an exam that has a mean of 50 and a standard deviation of 20.

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