A researcher computed the mean, the median, and the standard deiation for a set of performance scores. if 5 were to e added to each score, which of these three statistics would change? The mean? the median? the standard deviation? 这个题目我没理解意思,谁能帮我解释?
以下是引用wavebaby在2007-3-5 23:07:00的发言: A researcher computed the mean, the median, and the standard deiation for a set of performance scores. if 5 were to e added to each score, which of these three statistics would change? The mean? the median? the standard deviation? 这个题目我没理解意思,谁能帮我解释?