UPSC CS Main 2020 Statistics Paper I PDF | Question Paper

Central Government Jobs Other Jobs 2020

  • Year 2020
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages English & Hindi

Exam Details

Detail Information
Examination UPSC CS (Main) Exam
Year 2020
Conducting Body UPSC
Paper Statistics Paper I
Subject Statistics
Duration Three Hours
Maximum Marks 250
Number of Questions 8
Question Type Mixed

This is the Statistics Paper I from the UPSC Civil Services (Main) Examination held in 2020. Conducted by the Union Public Service Commission (UPSC), this paper is designed to assess candidates' in-depth knowledge of statistical concepts and their application. The exam allows three hours to complete and is worth a maximum of 250 marks. It comprises eight questions divided into two sections, with candidates required to answer five questions in total, including compulsory questions 1 and 5, and at least one from each section. This paper is crucial for aspirants aiming for top positions in government services, providing a valuable resource for understanding the exam's scope and difficulty.

Major Topics Covered

  • Probability
  • Geometric Distribution
  • Chebyshev's Inequality
  • Loss Distribution Function
  • Statistical Modeling

Why This Paper is Important

  • Useful for UPSC CS (Main) Exam preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • UPSC CS (Main) Exam 2020 Statistics Paper II
  • UPSC CS (Main) Exam 2019 Statistics Paper I
  • UPSC CS (Main) Exam 2021 Statistics Paper I
  • UPSC CS (Main) Exam 2020 Statistics Paper I Answer Key
  • UPSC CS (Main) Exam Statistics Syllabus
  • UPSC Statistics Paper I Syllabus
  • UPSC CS (Main) Exam Pattern
  • UPSC Statistics Paper I Exam Pattern

Instructions

  • पुस्तिका के मुख-पृष्ठ पर निर्दिष्ट स्थान पर किया जाना चाहिए ।
  • प्राधिकृत माध्यम के अतिरिक्त अन्य किसी माध्यम में लिखे गए उत्तर पर कोई अंक नहीं मिलेंगे ।
  • यदि आवश्यक हो, तो उपयुक्त आँकड़ों का चयन कीजिए तथा उनको निर्दिष्ट कीजिए ।
  • जब तक उल्लिखित न हो, संकेत तथा शब्दावली प्रचलित मानक अर्थों में प्रयुक्त हैं ।
  • प्रश्नों के उत्तरों की गणना क्रमानुसार की जाएगी ।
  • यदि काटा नहीं हो, तो प्रश्न के उत्तर की गणना की जाएगी चाहे वह उत्तर अंशतः दिया गया हो ।
  • प्रश्न-सह-उत्तर पुस्तिका में खाली छोड़ा हुआ पृष्ठ या उसके अंश को स्पष्ट रूप से काटा जाना चाहिए ।

  • There are EIGHT questions divided in TWO SECTIONS and printed both in HINDI and in ENGLISH.
  • Candidate has to attempt FIVE questions in all.
  • Questions no. 1 and 5 are compulsory and out of the remaining, any THREE are to be attempted choosing at least ONE question from each section.
  • The number of marks carried by a question / part is indicated against it.
  • Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly on the cover of this Question-cum-Answer (QCA) Booklet in the space provided.
  • No marks will be given for answers written in a medium other than the authorized one.
  • Assume suitable data, if considered necessary, and indicate the same clearly.
  • Unless and otherwise indicated, symbols and notations carry their usual standard meanings.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.

Questions (page 2)

Section A

Q1.

(a) एक बीमाकर्ता एक बड़ी कम्पनी के कर्मचारियों को एक स्वास्थ्य योजना का प्रस्ताव देता है। इस योजना के तहत, व्यक्तिगत रूप में कोई भी कर्मचारी पूरक बीमा व्याप्ति A, B तथा C में से यथार्थत: किन्हीं दो का अथवा किसी का भी नहीं चयन कर सकता है । कम्पनी के कर्मचारियों द्वारा A, B तथा C बीमा व्याप्ति को चुनने के अनुपात क्रमश: 1/6, 1/2 एवं 7/12 हैं । प्रायिकता ज्ञात कीजिए कि यादृच्छिक चुना गया कर्मचारी किसी भी पूरक बीमा व्याप्ति का चयन नहीं करेगा ।
An insurer offers a health plan to the employees of a large company. As part of this plan, individually any employee may choose exactly two or none of the supplementary coverages A, B and C. The proportions of the company employees that choose coverage A, B and C are 1/6, 1/2 and 7/12 respectively. Determine the probability that a randomly chosen employee will choose no supplementary coverage.

(b) माना X और Y सर्वसम स्वतंत्र वितरित (iid) यादृच्छिक चर हैं, जहाँ P(X = k) = 2-k, k = 1, 2, 3, . . P(X > Y) ज्ञात कीजिए । Let X and Y be iid random variables with P(X = k) = 2-k, k = 1, 2, 3, . Find P(X > Y).

(c) एक गुणोत्तर बंटन p(x) = 2-x; x = 1, 2, 3, . . , के लिए दर्शाइए कि शेबेशेव असमिका P(|X-2| le 2) > 1/2 देती है, जबकि वास्तविक प्रायिकता 15/16 है। For a geometric distribution p(x) = 2-x; x = 1, 2, 3, . , show that Chebyshev's inequality gives P(|X-2| le 2) > 1/2, while the actual probability is 15/16.

(d) एक पॉलिसी समूह, घाटे के लिए निम्नलिखित बंटन फलन का अनुपालन करता है:
F(x) = 1 - (θ)/(x), heta < x < infty.
20 घाटों के एक प्रतिदर्श के परिणाम निम्नलिखित रूप में प्राप्त हुए :
अन्तराल
x leq 10
10 < x leq 25
x > 25

घाटों की संख्या
9
6
5
2

A policy group follows the distribution function for losses as:
F(x) = 1 - (θ)/(x), heta < x < infty.
The results of a sample of 20 losses are obtained as follows:
Interval
Number of losses
x leq 10
9
10 < x leq 25
6
x > 25
5
2

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UPSC CS Main 2020 Statistics Paper I question paper page 1 instructions scan PDF download. Includes exam header, maximum marks, time allowed, and specific instructions in Hindi and English.
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UPSC CS Main 2020 Statistics Paper I question paper page 1 instructions scan PDF download. Includes exam header, maximum marks, time allowed, and specific instructions in Hindi and English.

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Frequently asked questions

What is the name of the exam?

The exam is the UPSC CS (Main) Exam.

What is the year of this question paper?

This question paper is from the year 2020.

Who conducts the UPSC CS (Main) Exam?

The exam is conducted by the UPSC (Union Public Service Commission).

What is the subject of this paper?

The subject of this paper is Statistics.

What is the paper code for this Statistics Paper I?

The paper code is URC-U-STSC.

What is the maximum marks for this paper?

The maximum marks for this paper are 250.

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