The mean price of new homes from a sample of housed is $155,000, with a standard deviation of $15,000. Calculate the z-scores to determine if the following house prices are unusual. Round up each z-score to two decimals; write YES or NO to the right of each z-score to indicate if it's usual or unusual. (a) $200,000 (b) $55,000 (c) $175,000 (d) $122,000
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