## NPTEL Learning Analytics Tools Week 5 Assignment Answers 2024

1. What is the purpose of diagnostic analytics?

- To understand patterns from educational data
- To find out reasons behind data patterns
- To provide recommendations to respective stakeholders
- To predict what will happen next based on existing data

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2. Consider the following scenario: An instructor has kept a record of the last five years record of his class in an Excel sheet. The fields he maintained for every year are Attendance, Marks in mid-term exams, marks in end-semester exams, and a package of their campus placement. If instrcutor wants to know which year stuents got highest average package then analysis at what level needs to be performed?

- Descriptive Analytics
- Diagnostic Analytics
- Prescriptive Analytics
- Predictive Analytics

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3. Consider the following set of values for attendance and marks. Attendance%: 80, 90, 75, 60, 85 Marks%: 85, 88, 70, 65, 90. Find out the Pearson’s Correlation coefficient.

- 0.967
- 0.782
- 0.889
- 0.705

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4. What are the limitations of Pearson’s correlation?

- It is sensitive to outliers
- It can not detect non-linear relationships
- Its slope can’t detect the intensity of correlation
- It can’t detect inverse relationship

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5. Numerically what is the maximum possible range of Pearson’s correlation coefficient?

- 0 to 1
- -1 to 0
- -1 to 1
- 1 to 10

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6. In week 5 lecture 32 in example of correlation matrix which two variable have highest value of correlation coefficient?

- Mid-term marks and Final Marks
- Attendance and Final Marks
- Attendance and mid-term marks
- student Id and attendance

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7. In week 5 lecture 33How rank of a variable is assigned in case if it has two identical values in the example of Spearman’s Correlation?

- Next consecutive number is assigned to second value in list
- Same rank is assigned to both values
- Rank is assigned to only first value
- Rank is divided e.g. 7 rank is assigned as 6.5 to both values

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8. What is the advantage of adding the concept of rank in Spearman’s correlation?

- It has made it insensitive to outliers
- It made it capable for non-linear relationships also
- It has increased the accuracy of correlation
- It has made slope to be capable of detecting intensity of correlation

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9. Consider the following sequence of actions: ABCCBABCACABBAC. What is the probability of A->C transition?

- 2/5
- 3/5
- 4/5
- 3/4

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10. Choose the most relevant option that can’t be inferred from a transition state diagram of a student given that actions performed by students are: Read, Watch Video, Seek, Take Quiz, Review Page.

- Did the student go on a certain webpage or not
- Did student access the quiz just after watching the video
- Did student watch the complete video or not
- Did the student watch the video or not

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