Use technology or a z-distribution table to find the indicated area. The scores on a standardized exam are normally distributed with a mean of 400 and a standard deviation of 50. Approximately 40% of the scores are greater than which score?
Don't know much about this, but here's my best shot. On the z score table, 40% corresponds roughly with a z-score of ... z score = score - mean. ______. std deviation ... 50 (.25) = score - 400 add 400 to both sides ... 412.5 = score ≈ 413.
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