UPSC Civil Services Main 2018 Statistics Paper I PDF Download

Central Government Jobs Other Jobs 2018

  • Year 2018
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination Civil Services Main Examination
Year 2018
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 2018. The paper is designed to test candidates' knowledge in Statistics and is divided into two sections, with a total of eight questions. Candidates are required to answer five questions in total, with compulsory questions 1 and 5, and at least one from each section. The paper allows three hours to complete and carries a maximum of 250 marks. This question paper is crucial for aspirants preparing for the Civil Services Main Examination, providing insights into the exam pattern, difficulty level, and important topics.

Major Topics Covered

  • Probability
  • Biased Coins
  • Conditional Probability
  • Statistical Distributions
  • Density Functions
  • Method of Moments
  • Uniform Distribution
  • Random Variables

Why This Paper is Important

  • Useful for Civil Services Main Examination 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 Civil Services Main Examination 2017 Statistics Paper I
  • UPSC Civil Services Main Examination 2019 Statistics Paper I
  • UPSC Civil Services Main Examination 2018 General Studies Paper I
  • UPSC Civil Services Main Examination 2018 Optional Subject Papers
  • UPSC Civil Services Main 2018 Statistics Paper I Answer Key
  • Civil Services Main 2018 Statistics Paper I Solutions
  • UPSC Civil Services Main Statistics Syllabus
  • UPSC Mains Optional Subject Syllabus

Instructions

  • पुस्तिका के मुख-पृष्ठ पर निर्दिष्ट स्थान पर किया जाना चाहिए ।
  • उल्लिखित माध्यम के अतिरिक्त अन्य किसी माध्यम में लिखे गए उत्तर पर कोई अंक नहीं मिलेंगे ।
  • गदि आवश्यक हो, तो उपयुक्त आँकड़ों का चयन कीजिए तथा उनको निर्दिष्ट कीजिए ।
  • जब तक उद्घिखित न हो, संकेत तथा शब्दावली प्रचलित मानक अर्थों में प्रयुक्त हैं ।
  • प्रश्मों 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 रूपष्ट 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.
  • Anon - be written in the medium authorized in the Admission Certificate which must be rty on the cover of this Question-cum-Answer (QCA) Booklet in the space provided.
  • No. will be given for answers written in a medium other than the authorized one. .ssume 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. Þ

Questions (page 2)

Section A

Q1.

(a) हमारे पास एक थैले में 3 सिक्के हैं । उनमें से एक सिक्का अनभिनत और बाकी चालाकी वाले अभिनत सिक्के हैं । जब तीनों सिक्के उछाले जाते हैं, तो उन पर 'चित' आने की प्रायिकता क्रमश: 0.5, 0.6, 0.1 है । यदि इन सिक्कों में से एक सिक्का याद्रच्छिक तरीके से चुना जाता है और तीन बार उछाला जाता है, तो P(HTT) क्या है ?
(i) यह मानते हुए कि (HTT) आता है, तो अनभिनत सिक्का चुनने की प्रायिकता क्या है ?
(ii) यहाँ पर {H, T} क्रमश: चित तथा पट निर्दिष्ट करते हैं ।
We have a bag with 3 coins in it. One of them is a fair coin, but the others are biased trick coins. When flipped the three coins come up 'heads' with probability 0.5, 0.6, 0.1 respectively. If one of these coins is picked at random and flipped three times,
What is P(HTT)?
(i) Assuming that (HTT) occurred, what is the probability of having chosen a fair coin?
(ii) Here {H, T} denote Heads and Tails respectively.

(b) मान लीजिए कि X1, X2, ..., Xn उस बंटन से एक प्रतिदर्श है जिसका घनत्व फलन f(x | heta) = heta( heta + 1) xheta - 1 (1 - x), 0 < x < 1, heta > 0 है । heta का आघूर्ण विधि से आकलन प्राप्त कीजिए ।
Let X1, X2, ..., Xn be a sample from a distribution with density function f(x | heta) = heta( heta + 1) xheta - 1 (1 - x), 0 < x < 1, heta > 0. Obtain an estimate of heta by method of moments.

(c) मान लीजिए कि दो यादृच्छिक चर एक जैसे हैं और स्वतंत्र रूप से बंटित हैं जिनका बंटन एकसमान U(0, 1) है । U = racXY का बंटन व्युत्पन्न कीजिए । E(U) पर टिप्पणी कीजिए ।
Consider two independent and identically distributed uniform U(0, 1) random variables. Derive the distribution of U = racXY. Comment on E(U).

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Frequently asked questions

What is the name of the exam?

The exam is the Civil Services Main Examination.

Which paper is this?

This is Statistics Paper I.

What is the conducting body?

The conducting body is UPSC.

In which year was this exam conducted?

This exam was conducted in 2018.

What is the maximum marks for this paper?

The maximum marks for this paper are 250.

What is the time allowed to complete the paper?

The time allowed is Three Hours.

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