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Free IIT Madras BS notes, PYQs and mock tests at btechi.in

Stats II · Expectation, variance & covariance

8 questions · 20 marks · 4 papers

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Statistics for Data Science II

Expectation, variance & covariance

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Quiz 1 · 26 Oct 2025 (AN)Quiz 1

Useful Reference Data for this Paper
Q1NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q2NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:

End Term · 31 Aug 2025 (FN)End Term

Read the passage below, then answer Q3–Q4
Based on the above data, answer the given subquestions.
Q3MCQ1 Mark·Choose one option
Key ↓
Identify the correct PMF of X.
1. A
2. B
3. C
4. D
Q4NAT2 Marks·Write the number
Key ↓
Your answer:

Quiz 2 · 3 Aug 2025 (AN)Quiz 2

Useful Reference Data for this Paper
Q5MSQ3 Marks·Choose all correct options
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q6NAT3 Marks·Write the number
Key ↓
Your answer:

End Term · 13 Apr 2025 (FN)End Term

Read the passage below, then answer Q7–Q8
Based on the above data, answer the given subquestions.
Q7NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Q8MCQ2 Marks·Choose one option
Key ↓
1. A16
2. B18.8
3. C6
4. D2.8

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1638

Q20.1

Q3D

Q41

Q5B, D

Q6504

Q76

Q8D

Questions and answer keys are reproduced from the official IIT Madras BS papers. Topics and repeated question types are BTechi’s own grouping. BTechi is not affiliated with IIT Madras.