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?

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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.