Statistics Paper I 2019 UPSC Main Section A Q1 Descriptive

Central Government Jobs Other Jobs 2019

  • Year 2019
  • Conducted By Union Public Service Commission (UPSC)
  • Questions 8
  • Maximum Marks 250
  • Duration तीन घंटे Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination Statistics Paper I
Year 2019
Conducting Body Union Public Service Commission (UPSC)
Paper Statistics Paper I
Subject Statistics
Duration तीन घंटे Hours
Maximum Marks 250
Number of Questions 8
Question Type Descriptive / Subjective

This SEO summary combines Page 1 exam metadata with the Section A content on probability presented in Page 2. The paper is Statistics Paper I (2019) for UPSC Civil Services Main Examination. It is a bilingual exam paper printed in Hindi and English, with eight total questions across two sections. Candidates must answer five questions, with questions 1 and 5 compulsory and at least one question from each section. Page 2 contains Section A, including Q1 with four sub-parts (a)-(d), each carrying 10 marks. Subparts cover distribution, convergence in probability and distribution, ancillary statistics for a log-ratio of IID samples from a Gamma-exponential family, and an applied hypothesis-testing scenario about spot remover efficacy. Time: 3 hours; Maximum marks: 250.

Major Topics Covered

  • Probability
  • Probability Distribution
  • Binomial Distribution
  • Convergence in Probability
  • Convergence in Distribution
  • Ancillary Statistics
  • Ratio of Logarithms
  • Independence
  • Identically Distributed
  • Probability Density Function
  • Gamma Distribution
  • Exponential Distribution
  • Parameter Inference
  • Hypothesis Testing
  • Proportion Testing
  • Z-test
  • P-value
  • UPSC Main Examination
  • Section A
  • Section B

Why This Paper is Important

  • Useful for Statistics Paper I preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
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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)

Q1. खण्ड A SECTION A मान लीजिए कि एक सिक्के को तीन बार उछाला जाता है। यदि X पहले उछाल पर सिरों
Q1. (a) (चितों) की संख्या दर्शाता है और Y, समस्त सिरों (चितों) की संख्या है, तो Z = X + Y का प्रायिकता बंटन लिखिए। Suppose a coin is tossed three times. If X denotes the number of heads on first toss and Y is the total number of heads, then write down the probability distribution of Z = X + Y.

(a) (a) (चितों) की संख्या दर्शाता है और Y, समस्त सिरों (चितों) की संख्या है, तो Z = X + Y का प्रायिकता बंटन लिखिए। / Suppose a coin is tossed three times. If X denotes the number of heads on first toss and Y is the total number of heads, then write down the probability distribution of Z = X + Y.

(b) Siddh की jiye ki Xn →P 0 यदि और केवल यदि Xn →d 0. / Prove that Xn →P 0 if and only if Xn →d 0.

(c) मान लीजिए कि f(x, α) = α x^{α-1} e^{-x^{α}}, x > 0, α > 0 के द्वारा प्रदत्त एक प्रायिकता घनत्व फलन f(x, α) से, X1 और X2 स्वतन्त्र और सर्वसम बंटित प्रेक्षण हैं। दर्शाइए कि ((log X1)/(log X2)) एक सहायक प्रतिदर्शज है। / Suppose X1 and X2 are independent and identically distributed (i.i.d) observations from the pdf given by f(x, α) = α x^{α - 1} e^{-x^{α}}, x > 0, α > 0. Show that ((log X1)/(log X2)) is an ancillary statistic.

(d) एक दाग़ (धब्बा) अपसारक के निर्माता का दावा है कि उसका उत्पाद 90% दाग़ों को मिटा (d) देता है। यदि एक याद्रच्छिक प्रतिदर्श में, निर्माता का उत्पाद, 20 में से 17 दाग़ मिटाए, तो शून्य परिकल्पना H0 : θ = 0.90 का वैकल्पिक परिकल्पना H1 : θ < 0.90 के विरुद्ध, 0.05 सार्थकता स्तर पर परीक्षण कीजिए और टिप्पणी कीजिए । / The manufacturer of a spot remover claims that his product removes 90% of all spots. If, in a random sample, 17 of spots were removed with the manufacturer's product, test the null hypothesis H0: θ = 0.90 against H1: θ < 0.90 at the 0.05 significance level and comment.

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Frequently asked questions

How many questions are in the paper?

Eight questions across two sections.

How many questions must a candidate attempt?

Five questions in total.

Which questions are compulsory?

Questions 1 and 5 are compulsory.

From each section, how many questions must be attempted?

At least one question from each section.

In what language should answers be written?

In the medium authorized on the Admission Certificate / QCA booklet cover.

What is the maximum marks for the paper?

250 marks.

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