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Suppose you mistakenly use CowsPerAcre instead of NitrogenLevel. According to the wrapper results, how much does the cross-validation accuracy change?

Compute the sum of the highest excess kurtosis values.

Question Set 2: Feature Selection

Will the mutual information I(Y ; X) = H(Y) − H(Y | X) increase, decrease, or stay the same?

Suppose you now collect an additional 150 observations where every plant has blue berries and is not edible. These are added to the original dataset of 400 plants, resulting in 550 plant observations in total.  Based on this new data, indicate whether the following quantities will increase, decrease, or remain the same.

Based on the filtering approach, which 3 features are selected?

Compute the marginal gain in accuracy from adding CowsPerAcre to the subset SoilMoisture, IrrigationFreq, based on wrapper results.

Under EM, what is the (normalized) responsibility of Cluster 2? Round to 3 decimal spaces. 

What percentage of the total variance is retained by the first 3 principal components? Round to the nearest whole number.

How would you write the number 0.05370 using scientific notation?