# UPSC ISS Statistical Services Paper 1 Previous Question Papers

UPSC Indian Statistical Service Statistics Paper 1 previous year question papers are required by all the applicantso as to prepare for exam in best way. UPSC ISS Paper 1 Question Papers will help to know what type of questions will be seen in exam. Below are the questions which are seen in exam paper and the candidates need to prepare the questions of these type-

Q1: Answer all of the following parts-

1. For following frequency distribution on 229 values-
 Class Frequency 0-10 12 10-20 30 20-30 X 30-40 65 40-50 Y 50-60 25 60-70 18

The Median if found to be 46. Find the values of X & Y.

1. Out of 200 persons appeared for an exam, 80% were males and rest were females. Among 30 married males, 14 were successful, 110 unmarried males were successful. In respect of 10 married females, 4 were successful, 20 unmarried females were successful. Computer Yule’s coefficient of association between success in examination and marital status for males and females.
2. Describe run test for randomness. For sequence of outcomes of 14 tosses of coin,

H T T H H H T H T T H H T H

Test whether the outcomes are in random order. (Given the lower and upper critical values RL– 3, RU= 12 at 0.05 significance level)

1. Find the missing value in table by assuming polynomial form for Y-
 X 0 1 2 3 4 Y 1 2 4 – 16