Question: , ( + ) . 20 , . Ex1-data.xlsx, 1 1. , , , , , , , Excel ( ). 2. . ; 3.
, ( + ) . 20 , . Ex1-data.xlsx, 1 1. , , , , , , , Excel ( ). 2. . ; 3. , . R2 . 5%, excel () . . ; 4. 150 50 . 500 90 ; ; 5. , 2, ( ) 2005 2019. , , 2020. (ii) =0,8, . 2020;
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