How to Prepare Statistics for Combined Defence Services Examination – The Union Public Service Commission conducts the Combined Defence Services Examination, also known as the CDS exam, to recruit Commissioned Officers to the Indian Military Academy (IMA), Indian Air Force Academy (IAF) Indian Naval Academy (INA), and Officers Training Academy (OTA).
The selection procedure is divided into two stages i.e., a written exam and SSB Interview.
- One of the most significant topics for students studying for defense examinations and other competitive exams is statistics. Around 8 to 10 questions from statistics are asked in the CDS written exam every year.
- It is included in the syllabus because it aids in assessing a candidate’s ability to collect data, evaluate it, present it, and utilize the right analysis technique (Line of Regression, Classification, or other models) to successfully convey results. It essentially generalizes the sample data such that everyone may understand it. Statistics questions on defense exams can be hard, and a student must handle them deftly and rapidly in order to get a good grade.
- Statistics is incorporated in the syllabus for various government and public sector tests, such as SSC, Railways, Insurance, and banking exams, in addition to the CDS and other defense exams. As a result, statistics is a topic that you must not overlook.
On that note, let’s discuss some important topics and tips to help you score in the mathematics section.
Tips to Prepare Statistics for Defence exams
Clarity of Concepts – Once you’ve mastered the concepts, take the statistics quiz to prepare for the defence exam. You can also take an online statistics test for defence exams to see how well you’ve studied for the entrance examinations.
Accuracy – Download a statistics practice test with answers and learn how to solve them using the most effective approaches. Then, to increase your accuracy and efficiency, spend time-solving as many statistics practice sets as feasible.
Make Notes – Take notes on the statistics definition and several statistics formulas with examples before beginning your preparations. When there are a lot of expressions, such as when listing out numerous statistics expression formulas, it’s easy to get confused.
Manage Time Properly – You will notice that answering a question takes a long time at first, but your time management skills will improve as you practice more and more Statistics questions.
Practice well – Learn short tricks and formulas in statistics and attempt practice sets, quizzes and mock tests for defence examinations.
Important Statistics Topics for Defence Exams
Frequency Distributions and Graphing
You’ll learn about the frequency distribution of data and different types of charting, such as tabulation, bar graphs, pie charts, and line graphs, in this section.
Rankings in a Distribution
It’s a method of assessment. Aspirants must know about percentile and percent ranks and should know how to calculate them in a distribution.
Central Tendency
You will learn about mean, mode, and median known as measures of central tendency. Furthermore, various methods to find them. For instance, the mean of a given set of data can be calculated through three methods i.e., direct mean, step deviation and assumed mean method using Mean Deviation.
Variability
It measures how many standard deviations a population’s raw score is above or below the mean. You must be thorough with the different ways to describe variability in a data set i.e., range, variance, standard deviation and others.
Estimation and Sampling Distributions
The sampling distribution is the statistical probability distribution obtained from a sample selected from a population.
Probability
It is a numerical representation of the frequency with which an event occurs. Aspirants should be through with theoretical probability, The difference between experimental probability and theoretical probability, complementary events and more.
Also Read – UPSC CDS Recruitment 2021
