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Stats II · Quiz 2 · 3 Aug 2025 (Afternoon)

15 questions · 40 marks · 60 min

Answer key Take as mock

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Statistics for Data Science II

Quiz 2 · 3 Aug 2025 (Afternoon)

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.

Useful Reference Data for this Paper
Q1MCQ3 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q2MSQ3 Marks·Choose all correct options
Key ↓
1. A
2. B
3. C
4. D
5. E
Q3MSQ3 Marks·Choose all correct options
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q4NAT3 Marks·Write the number
Key ↓
Your answer:
Q5NAT3 Marks·Write the number
Asked 4 times Key ↓
Your answer:
Read the passage below, then answer Q6–Q7
Based on the above data, answer the given subquestions.
Q6MCQ3 Marks·Choose one option
Asked 5 times Key ↓
1. A
2. B
3. C
4. D
Q7NAT2 Marks·Write the number
Asked 2 times Key ↓
Find the value of P(X < 1, Y < 1). Enter the answer correct to two decimal places.
Your answer:
Read the passage below, then answer Q8–Q9
Based on the above data, answer the given subquestions.
Q8MCQ2 Marks·Choose one option
Asked 5 times Key ↓
What is the marginal distribution of Y ?
1. A
2. B
3. C
4. D
Q9NAT3 Marks·Write the number
Asked 4 times Key ↓
Your answer:
Read the passage below, then answer Q10–Q11
Based on the above data, answer the given subquestions.
Q10MCQ3 Marks·Choose one option
Key ↓
Which of the following options is an acceptable approximate model for Y as per the Central Limit Theorem?
1. A
2. B
3. C
4. D
5. E
Q11NAT2 Marks·Write the number
Key ↓
Using the Central Limit Theorem, it is calculated that the approximate value of P(Y > a) is 0.023. What is the value of a? (See the “Useful Data” given in the Question 2 ).
Your answer:
Read the passage below, then answer Q12–Q13
Based on the above data, answer the given subquestions.
Q12NAT3 Marks·Write the number
Key ↓
Your answer:
Q13NAT2 Marks·Write the number
Asked 2 times Key ↓
Your answer:
Read the passage below, then answer Q14–Q15
Based on the above data, answer the given subquestions.
Q14NAT2 Marks·Write the number
Asked 4 times Key ↓
Find the value of k.
Your answer:
Q15NAT3 Marks·Write the number
Asked 2 times Key ↓
Your answer:

Official Key

Master Answer Key & Explanations

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

Reveal Key

Q1D

Q2A, E

Q3B, D

Q4504

Q50.22 to 0.28

Q6D

Q70.29 to 0.35

Q8B

Q90.42 to 0.48

Q10C

Q11220

Q1260

Q130.75 to 0.81

Q144

Q150.41 to 0.47

Questions and answer keys are reproduced from the official IIT Madras BS papers. BTechi is not affiliated with IIT Madras.