Scores on an examination are assumed to be normally distributed with mean 78 and variance 36. a. Su
Question: Scores on an examination are assumed to be normally distributed with mean 78 and variance 36.
a. Suppose that students scoring in the tip 10% of this distribution are to receive an A grade. What is the minimum score a student must achieve to earn an A grade?
b. What must be the cutoff point for passing the examination if the examiner wants only the top 28.1% of all scores to be passing?
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