## NPTEL Learning Analytics Tools Week 3 Assignment Answers 2024

1. Arrange the following processes of ML in the correct sequence according to their time of occurrence from the first step. 1. Choosing the model 2. Training 3. Data collection and processing 4. Testing

- 3-1-2-4
- 2-3-1-4
- 3-2-4-1
- 3-4-1-2

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2. For imbalanced datasets, which of the following performance metrics is generally used?

- Precision
- Recall
- F-Score
- Accuracy

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3. For the below confusion matrix, the Accuracy value is **__** (Report your answers correct to two decimal places)

- 57%
- 20%
- 60%
- 30%

Answer :-

4. Two Raters rate the engagement of the group of students in an aviation project. The following tables depict the observation made by them, Calculate the value of kappa:

- 0.6
- 0.4
- 0.43
- 0.1

Answer :-

5. ROC is generated by plotting

- True Positive Rate (y-axis) against the False Positive Rate (x-axis)
- True Positive Rate (x-axis) against the False Positive Rate (y-axis)
- True Positive Rate (x-axis) against the True Negative Rate (y-axis)
- True Positive Rate (x-axis) against the False Negative Rate (y-axis)

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6. The harmonic mean of Precision and Recall is another performance metric known as

- Cohenâ€™s Kappa
- F1-score
- Sensitivity
- Specificity

Answer :-

7. Use the below content to answer Q 7, Q 8, and Q 9 The below table provides the actual values (Ya) and the predicted values (Yp) for students who obtained marks in the end-semester examination. The values 1 and 0 represent whether the students scored greater than 50% or less than 50%, respectively.

7. For the above table calculate Precision Value.

- 0.4
- 0.75
- 0.57
- 0.25

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8. For the above table, calculate the value of Recall.

- 0.25
- 0.5
- 0.44
- 0.8

Answer :-

9. For the above table, calculate the value of accuracy.

- 0.25
- 0.47
- 0.75
- 0.8

Answer :-

10. Which of the following algorithms can be used with labeled data?

- Regression algorithm
- Clustering algorithm
- Association algorithm
- Both a. and b
- Both b. and c
- Both a. and c

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