20. In the example in problem 18, assume that the mean is 300 and the standard deviation is 25. Using a normal curve table, what scores would be the top and bottom scores to find (a) the middle 50% of architects, (b) the middle 90% of architects, and (c) the middle 99% of architects?
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7 rule, is a statistical rule which states that for a normal distribution: - Approximately 68% of the data falls within one standard deviation of the mean. - Approximately 95% of the data falls within two standard deviations of the mean. - Approximately 99.7% of Show moreā¦
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