Computers and Technology, 30.07.2021 09:50 cisneros3

次表で与えられた売上高（単位：億円）と利益（単位：億円）の回帰関係と決定係数を求める。売上高を、利益をとしたとき、 ∑ = 1,921、∑ = 419、∑ ^2= 569,279、∑ ^2 = 29,935、∑ = 129,897
となる。
年度 2006 2007 2008 2009 2010 2011 2012 2013 2014
売上高 54 68 88 145 195 240 302 379 450
利益 10 11 16 29 32 50 73 90 108
(1) このデータの正規方程式を示しなさい。
(2) 正規方程式を解いた結果の回帰式は = −6.80 + 0.25 となります。これを用いて決定係数は ^2 = 0.97 であることを示しなさい。

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次表で与えられた売上高（単位：億円）と利益（単位：億円）の回帰関係と決定係数を求める。売上高を、利益をとしたとき、 ∑ = 1,921、∑ = 419、∑ ^2= 569,279、∑ ^2 =...