Question: A laboratory conducts a study to examine the effect of different levels of nitrogen on the yield of lettuce plants. Use the data shown here

A laboratory conducts a study to examine the effect of different levels of nitrogen on the yield of lettuce plants. Use the data shown here to fit a linear regression model. Test for possible lack of fit of the model.

Coded Nitre Yield (Emergent Stalks per Plot) 21, 18, 17 24,22. 26 34,29,32

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