第22题: [单项选择]体质指数的公式为()。 A. 体质指数=体重(kg)÷[身高(cm)]3 B. 体质指数=体重(kg)÷[身高(cm)]2 C. 体质指数=体重(kg)÷[身高(m)]3 D. 体质指数=体重(kg)÷[身高(m)]2 参考答案:D
第23题: [简答题]Mean 参考答案: Mean:A measure of central tendency of the probability distribution of a random variable that equals the weighted average of all possible outcomes using their probabilities as weights.