The scores of students on a standardized test form a normal distribution with a mean score of 500 and a standard deviation of 100. Between what two values do the middle 50% of scores lie?

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The Answer of The scores of students on a standardized test form a normal distribution with a mean score of 500 and a standard deviation of 100. Between what two values do the middle 50% of scores lie?

The Scores of Students on a Standardized Test Form a Normal