Find the best predicted cotinine level for a person who smokes40 cigarettes per

Question

Find the best predicted cotinine level for a person who smokes40 cigarettes per day. x (cigs per day) 60   10    4        15    10    1        20     8       7    10       10    20 y (continine)    179   283 75.6    174   209 9.51    350   1.85  43.4   25.1   408   344 Find the best predicted cotinine level for a person who smokes40 cigarettes per day. x (cigs per day) 60   10    4        15    10    1        20     8       7    10       10    20 y (continine)    179   283 75.6    174   209 9.51    350   1.85  43.4   25.1   408   344 y (continine)    179   283 75.6    174   209 9.51    350   1.85  43.4   25.1   408   344

Explanation / Answer

By using some statisticalpackage we have the following regression analysis

Regression Analysis: Yversus X

The regression equationis
Y = 139 + 2.48 X
Put X = 40 in the above regression equation we have
Y = 139 + 2.48 (40)
= 238.2
Therefore the best predicted cotinine level for a person who smokes40 cigarettes per day.
is 238.2

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