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## NPTEL Data Science for Engineers Assignment 7 Answers (Week 7)

Q1. Which of the following algorithms is/are suitable for the below problem statement?

Problem Statement: To classify the severity of the infection on covid-19 patients as critical/ not critical based on their comorbidity, habits, and some other demographics data.

a. Linear Regression
b. Logistics Regression
c. K-Means
d. Decision tree

b. Logistics Regression

Q2. Which parameter determines the goodness of fit of a Logistic Regression model?

a. Sensitivity

c. RMSE

d. Accuracy

d. Accuracy

Q3. Which of the following functions is used to bind the probability of x between 0 and 1?

a. Log function

b. Sigmoid function

c. Sine

d. Cosine

Q4. Which of the following strategies do we apply to obtain the best fit line for data in Linear Regression?

a. Logarithmic loss

b. Maximum likelihood

c. Least square error

d. Both B and C

Refer to the confusion matrix mentioned below for answering question 5. The matrix results from a classification model applied to test the working condition of parts of a refrigerator based on some parameters.

Q5. What is the value of specificity?

a. 0.861

b. 0.841

c. 0.642

d. 0.159

Q6. The R-Squared for the built linear model is ___

a. 0.7516

b. 0.6317

c. 0.8111

d. 0.8107

Q7. According to the built model, which variable has no contribution to the model?

a. Age

b. KM

c. CC

d. None of the above

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