3. Normal Distribution and Z - Scores Assume a normal distribution for a population of scores for a standardized exam. The average exam score is 70, and the standard deviation is 5. Jeff's exam score is 63. a) What percentage of the population has an exam score greater than Jeff's? b) What percentage of the population has an exam score greater than Jeff's but less than the score of 74? c) If 10,000 people were given the exam, how many of them have an exam score less than Jeff's?

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3. Normal Distribution and Z - Scores
Assume a normal distribution for a population of scores for a standardized exam.
The average exam score is 70, and the standard deviation is 5. Jeff's exam score is
63.
a) What percentage of the population has an exam score greater than Jeff's?
b) What percentage of the population has an exam score greater than Jeff's but
less than the score of 74?
c)
If 10,000 people were given the exam, how many of them have an exam score
less than Jeff's?
Transcribed Image Text:3. Normal Distribution and Z - Scores Assume a normal distribution for a population of scores for a standardized exam. The average exam score is 70, and the standard deviation is 5. Jeff's exam score is 63. a) What percentage of the population has an exam score greater than Jeff's? b) What percentage of the population has an exam score greater than Jeff's but less than the score of 74? c) If 10,000 people were given the exam, how many of them have an exam score less than Jeff's?
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