木同学2022-11-16 17:46:21
为什么选C
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Evian, CFA2022-11-16 19:00:52
ヾ(◍°∇°◍)ノ゙你好同学,
Julie Moon is an energy analyst examining electricity, oil, and natural gas consumption in different regions over different seasons. She ran a simple regression explaining the variation in energy consumption as a function of temperature. The total variation of the dependent variable was 140.58, and the explained variation was 60.16. She had 60 monthly observations. The sample standard deviation of monthly energy consumption is closest to:
monthly energy consumption是dependent variable, Y。而计算因变量Y的样本方差,等于因变量的总偏差除以(n-1)相关的,那么因变量Y样本标准差就等于根号下样本方差,计算结果为:
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