考慮模型
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.
(怕翻譯出錯，所以重點post)
b) Explain the meaning of the regression coefficients
因為什麼都沒說就叫我們解釋，所以我想應該是問R^2
但是
e) Compute the coefficient of multiple determination,
and interpret its meaning
這是問R^2 吧? 讓我很困惑~.~?
d) Determine whether there is a significant second-degree
polynomial relationship between price and sales
這是要整體F檢定，還是要檢定二次項β2 偏F檢定?
second-degree是 二次項 的意思嗎?
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