作者chrisjon (恬静悠闲)
看板Statistics
标题[问题] 回归题目意思2
时间Sat Nov 17 22:46:27 2007
考虑模型
Yi = β0 + β1X1 + β2(X1^2) +εi
︿
Yi = 729.86 - 10.887*X1 + 0.046*X2
Yi = Number of Packages Sold
X1 = Price
X1^2 = Price^2
Five stores were randomly assigned to each of three different price
(79,99 and 119) levels for a package of three azors.
(怕翻译出错，所以重点post)
b) Explain the meaning of the regression coefficients
因为什麽都没说就叫我们解释，所以我想应该是问R^2
但是
e) Compute the coefficient of multiple determination,
and interpret its meaning
这是问R^2 吧? 让我很困惑~.~?
d) Determine whether there is a significant second-degree
polynomial relationship between price and sales
这是要整体F检定，还是要检定二次项β2 偏F检定?
second-degree是 二次项 的意思吗?
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