Machine Learning Practice · Quiz 1 · 25 Feb 2024 · January 2024 term

Question 22: Consider the below code : keep following symbols in mind…

Question 22

+3 marksOne or more correct options

Consider the below code :

keep following symbols in mind:

>>>: Represents input code
# : Represents comment in a code
... : Represents code continuation
Without any symbols at the beginning of a line then it is output of just above input line of code.
arrow pointing towards right is code continuation to another line.

python

1>>> from sklearn.feature_selection import SelectKBest, chi2
2>>> from sklearn.datasets import load_wine
3>>> X,y = load_wine(return_X_y=True,as_frame=True)
4>>> print(X.shape)
5(178, 13)
6
7>>> print(X.columns)
8['alcohol', 'malic_acid', 'ash', 'alcalinity_of_ash', 'magnesium',
9 'total_phenols', 'flavanoids', 'nonflavanoid_phenols', 'proanthocyanins',
10 'color_intensity', 'hue', 'od280/od315_of_diluted_wines', 'proline']
11
12>>> skb = SelectKBest(chi2, k=3)
13>>> X_selected = skb.fit_transform(X, y)
14
15>>> print(skb.scores_)
16[5.44, 28.06, 0.74, 29.38, 45.02, 15.62, 63.33, 1.81,
17 9.36, 109.01, 5.18, 23.38, 16540.06]
18
19>>> print(skb.pvalues_)
20[6.56e-02, 8.03e-07, 0.68, 4.16e-07, 1.66e-10, 4.05e-04,
21 1.76e-14,  0.40, 9.24e-03, 2.12e-24, 0.074, 8.33e-06, 0]
22
23>>> print(skb.pvalues_.argsort())
24[12,  9,  6,  4,  3,  1, 11,  5,  8,  0, 10,  7,  2]

Which of the following feature(s) will be selected in X_selected from X ?

Select all that apply.

A
malic_acid
B
magnesium
C
flavanoids
D
proanthocyanins
E
color_intensity
F
proline

Show answer

Correct answers

C
flavanoids
E
color_intensity
F
proline

See the whole paper Take it as a mock test

Question 22 of 24 in the IIT Madras BS Machine Learning Practice (MLP) Quiz 1 paper sat on 25 Feb 2024, in the January 2024 term (IIT M DIPLOMA AN2 EXAM QDD2 25 Feb 2024). It carries 3 marks.

Question 22: Consider the below code : keep following symbols in mind…

Question 22

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