SSC CGL JSO Mock Test Free (Junior Statistical Officer): Paper-2 Statistics

SSC CGL JSO Mock Test Free: Quick Answer

This page lists 3 free SSC CGL JSO mock tests: the Tier-2 Paper-2 Statistics paper, 100 questions in 2 hours each, 300 questions in all, as of 6 November 2026. Every test is free to attempt on this site, with the same 2-hour clock as the real paper. Paper 2 has 100 questions for 200 marks (2 marks per question, −0.50 for a wrong answer). It is only for Junior Statistical Officer and Statistical Investigator Grade-II candidates — if you are not shortlisted for those posts, you do not sit Paper 2 at all.

🔥 Key Exam Takeaway: JSO is a Level 6 post (₹35,400 starting basic) in the Ministry of Statistics & Programme Implementation, and Paper 2 is the only paper that decides it. Your merit for JSO is 390 marks of Paper 1 plus 200 marks of Paper 2 = 590 marks; Tier 1 only shortlists you and its marks count for nothing. Paper 2 is not a side paper: it is one-third of your final merit, and it is examined at graduation level in statistics — probability distributions, sampling theory and hypothesis testing — not at the 10th-standard level of Tier-1 maths.

Why is there no JSO cut-off on this page? Because SSC has not published a Tier-2 cut-off, and this site does not print cut-offs from coaching pages. The figures on this page come from the official SSC CGL 2026 notice (published on ssc.gov.in on 21 May 2026, Paras 13.9 and 16), as tabulated in our syllabus and Tier-2 pattern notes. The vacancy figures are from SSC's tentative vacancy list (24 September 2026), as tabulated in our vacancy note. This page is as of 6 November 2026.

SSC CGL JSO Exam Pattern 2026: Paper 1 and Paper 2

Junior Statistical Officer sits in the Ministry of Statistics & Programme Implementation (MoSPI); Statistical Investigator Grade-II sits in the Registrar General of India (RGI). Both are Level 6, Group B posts, and the 2026 tentative vacancy list gives them 158 JSO posts and 48 Statistical Investigator Grade-II posts. Both posts sit the same Paper 2.

Three rules decide how you should practise. First, Paper 2 is a separate paper on a separate day or shift. It is not part of the Paper-1 sitting, and it has no internal sections — the 2 hours are yours to split across the twelve statistics topics. Our Paper-2 mocks give you the full 2 hours for the whole paper, like the real exam. Second, Paper 2 is one-third of your merit. Paper 1 gives you 390 merit marks and Paper 2 gives you 200; a candidate who treats Paper 2 as revision after Paper 1 gives away a third of the list. Third, the qualifying minimums apply in Paper 2 too. You must score at least 30% of 200 for UR (60 marks), 25% for OBC/EWS (50 marks) and 20% for all other categories (40 marks) in Paper 2, as in every Tier-2 section — and you must also clear every Paper-1 section and the Computer module and DEST. Those are minimums, not targets: real cut-offs run far higher. Tier 1 draws separate lists for JSO and Statistical Investigator candidates, and their Tier-1 cut-offs run higher than the general list because the posts are few.

Junior Statistical Officer vs Statistical Investigator Grade-II

The two posts sit the same Paper 2, but they are different jobs in different departments. Junior Statistical Officer (158 posts) works in the Ministry of Statistics & Programme Implementation, on national statistics — surveys, data collection and analysis. Statistical Investigator Grade-II (48 posts) works in the Registrar General of India, on census and demographic data. Both are Level 6, Group B, both start at ₹35,400 basic, and both are selected from the same merit formula (390 + 200). One difference matters at the application stage: the notice marks Statistical Investigator Grade-II as not suitable for colour-blind candidates, so check the notice's suitability list before opting for it. For the exam it makes no difference — the same Paper 1, the same Paper 2, the same preparation. Choose on the work: national statistics and surveys, or census and demography.

What SSC CGL Paper 2 Tests: Topics in These Mocks

Paper 2 covers twelve statistics topics at graduation level: collection, classification and presentation of data; measures of central tendency (mean, median, mode, quartiles, deciles, percentiles); measures of dispersion (range, quartile deviation, mean deviation, standard deviation); moments, skewness and kurtosis; correlation and regression (including Spearman's rank correlation and multiple and partial correlation for three variables); probability (conditional, compound, Bayes' theorem); random variables and the Binomial, Poisson, Normal and Exponential distributions; sampling theory; statistical inference (estimation, Z, t, chi-square and F tests); analysis of variance; time series; and index numbers.

The counts below are real: they are the question topics counted across the actual mock tests listed on this page, not a guess at the syllabus. In the 3 Paper-2 tests (300 questions), correlation and regression leads with 36 questions, followed by probability (36), central tendency (32) and dispersion (32), probability distributions (30), statistical inference (20), collection and classification of data (18), analysis of variance (18) and index numbers (18), moments, skewness and kurtosis (12), sampling theory (12) and time series analysis (12), sampling and estimation (10), hypothesis testing (8) and time series (6). Two pairs of labels name the same syllabus area under different words — "sampling theory" in Mock Tests 01–02 and "sampling and estimation" in Mock Test 03, and "time series analysis" in 01–02 and "time series" in 03 — so the true weight of sampling is 22 questions and of time series is 18, not the split figures.

Two topics deserve special attention. Probability distributions (30 questions) is where marks are won or lost: know the Binomial, Poisson, Normal and Exponential distributions by their mean, variance and shape, not just by name. Correlation and regression (36 questions, the largest topic) rewards candidates who can work the formulas — Spearman's rank correlation and the regression coefficients — rather than memorise definitions. Both topics need calculation practice, not reading.

The twelve topics fall into three families, and each family needs a different kind of preparation. Descriptive statistics (central tendency, dispersion, moments, index numbers — 94 of the 300 questions across the three mocks) is formula speed: mean, median, mode, standard deviation and the index-number formulas must be computable in under a minute each. Probability and distributions (probability, probability distributions, correlation and regression — 102 questions) is concept plus calculation: know when to use Bayes' theorem, which distribution fits the situation, and what the regression coefficients mean. Inference and data (collection and classification, sampling, statistical inference, hypothesis testing, ANOVA, time series — 104 questions, the largest family) is procedure: the steps of a test, the choice between Z, t, chi-square and F, and the reading of a time-series decomposition. Candidates usually over-prepare the first family and under-prepare the third — but the third is the largest family, and it is also the most scoreable once the test procedures are clear, because every question follows the same steps.

All SSC CGL JSO Mock Tests Free (Paper 2)

Every test below is a separate file on this site, counted once. The series runs 01–03 with no gaps. Each test has 100 questions in 2 hours.

• SSC CGL Tier-2 Paper-II Statistics Mock Test 01
• SSC CGL Tier-2 Paper-II Statistics Mock Test 02
• SSC CGL Tier-2 Paper-II Statistics Mock Test 03

That is 3 tests and 300 questions in total. The site also has 4 short Statistics drills of 15 questions each (60 questions in all), listed separately from the 100-question series above — use them for a quick daily drill, not as a substitute for a full 2-hour paper. If you want the Paper-1 sitting as well, the site also has combined-sitting Paper-1 full mocks of 150 questions with locked sectional timers — start from the SSC CGL mock test free page. The Paper-1 mocks are a separate series and are not counted in the 300 questions above.

How to Use These JSO Mocks

Attempt Paper 2 at Paper-2 speed. Two hours for 100 questions is 72 seconds per question, and there are no sections inside Paper 2 — you decide the order. A workable order is: central tendency, dispersion and index numbers first (fast, formula-based), then correlation, regression and probability (calculation-heavy), then sampling, inference and ANOVA last (the longest questions). If a question needs more than two minutes, mark your best guess and move on; at +2 / −0.50, a blind guess on a four-option question gains +0.125 marks on average ((1/4 × +2) + (3/4 × −0.50) = +0.125), so the penalty alone does not make it a losing bet — but a guess still costs time at 72 seconds a question, so guess only when you can rule out at least one option.

Score yourself honestly. For a Paper-2 mock, note three numbers: attempted, correct, and marks (correct × 2 minus wrong × 0.50). Then split the marks by topic family: descriptive statistics (central tendency, dispersion, moments), probability and distributions, and inference (sampling, testing, ANOVA, time series, index numbers). A total above the 60-mark UR floor means nothing on its own — check all three families, because a weak inference family is the usual reason JSO candidates miss the list while clearing the total.

Revise from your errors, not from the answer key alone. Keep a one-line error log: the topic, the formula you missed, and the correct form. Most Paper-2 errors come from ten formulas — standard deviation, Spearman's rank correlation, the regression coefficients, Bayes' theorem, the Normal distribution's areas, the t-test, chi-square, ANOVA's F-ratio, and the index-number formulas — and the log will show you which two or three are yours within two mocks. Fix those before you attempt the next mock; otherwise you will practise the same mistake three times. Keep a one-page formula sheet — one line per formula, no derivations — and revise it before every mock until the ten formulas above come without looking. The sheet is a revision tool, not a crutch: do not carry it into the mock itself, or you will never learn which formulas you actually know.

Do not prepare Paper 2 alone. Your merit is 390 + 200, and Paper 1 is the larger share. Alternate Paper-2 mocks with Paper-1 full mocks so neither paper goes stale, and clear the Computer module and DEST in practice — both are qualifying, and failing either removes you from the merit list whatever your Paper-2 score is.

Common Mistakes in SSC CGL JSO Preparation

• Treating Paper 2 as a formality after Paper 1. It is 200 of your 590 merit marks. Candidates who prepare only Paper 1 lose the JSO list to candidates who prepared both.
• Guessing on every question. At −0.50 with 2-mark questions, four wrong answers cancel one right one, and a blind four-option guess gains +0.125 marks on average — so random guessing does not lose marks on the penalty alone. It still loses you time: guess only after eliminating at least one option.
• Learning formulas by name instead of by use. Knowing that Spearman's rank correlation exists is not the same as computing it from a ranked table under time pressure. Practise the arithmetic.
• Confusing population and sample formulas. Standard deviation, variance and the standard error differ by the denominator — read whether the question gives a population or a sample before you calculate.
• Ignoring inference. Sampling, hypothesis testing and ANOVA are a third of the paper's weight in the syllabus, and they are the topics most candidates leave for last. They are also the most scoreable once the test procedures are clear.
• Memorising distributions without their parameters. Knowing the Normal distribution's name is not the same as knowing its mean and variance, or the area within one standard deviation. Every distributions question tests a parameter — learn mean and variance for each of the four distributions.
• Skipping index numbers and time series as "small topics". Together they are 36 of the 300 questions across the three mocks — 12% of the paper. They are also among the most formulaic questions in Paper 2: the index-number formulas and the time-series components reward one round of focused practice.
• Forgetting the qualifying floors. Clearing the total is not enough: you must clear 30/25/20% in Paper 2, in every Paper-1 section, in the Computer module and in DEST.
• Skipping Paper-1 practice to focus on Paper 2. Paper 1 is 390 of your 590 marks. A strong Paper 2 cannot rescue a weak Paper 1.

SSC CGL JSO Practice Questions with Answers

Q1. What is the mean of the first 10 natural numbers? (a) 5 (b) 5.5 (c) 6 (d) 4.5 Answer: (b) 5.5. The sum 1 + 2 + … + 10 = 55, and 55 ÷ 10 = 5.5.

Q2. What is the median of 3, 7, 9, 12, 15? (a) 7 (b) 9 (c) 12 (d) 9.2 Answer: (b) 9. With five values in order, the median is the third value, 9.

Q3. What is the population standard deviation of 2, 4, 6, 8, 10? (a) 2 (b) 2.83 (c) 4 (d) 8 Answer: (b) 2.83. The mean is 6; the squared deviations are 16, 4, 0, 4, 16, summing to 40; the population variance is 40 ÷ 5 = 8, and √8 ≈ 2.83.

Q4. The correlation coefficient always lies between: (a) 0 and 1 (b) −1 and +1 (c) −∞ and +∞ (d) 0 and 100 Answer: (b) −1 and +1. A correlation of +1 is a perfect positive linear relation, −1 a perfect negative one, and 0 no linear relation.

Q5. If P(A) = 0.4 and P(B) = 0.5, and A and B are independent events, what is P(A ∩ B)? (a) 0.9 (b) 0.1 (c) 0.2 (d) 0.45 Answer: (c) 0.2. For independent events P(A ∩ B) = P(A) × P(B) = 0.4 × 0.5 = 0.2.

SSC CGL JSO Mock Test FAQs

How many free SSC CGL JSO mock tests are on this site?

3 in total as of 6 November 2026: Paper-2 Statistics Mock Tests 01–03, 100 questions each, 300 questions in all. Each test is 2 hours at +2 / −0.50. Four short 15-question Statistics drills are listed separately and are not counted in the 300.

What is the pattern of SSC CGL Paper 2?

100 questions, 200 marks, 2 hours, 2 marks per question and 0.50 deducted per wrong answer, on twelve statistics topics at graduation level. It is only for Junior Statistical Officer and Statistical Investigator Grade-II candidates.

Who is eligible for the JSO post?

JSO is open to graduates with statistics as a subject (or the equivalent qualification in the notice) who clear Tier 1 and Tier 2 Paper 1 and Paper 2; the post is in the Ministry of Statistics & Programme Implementation. Statistical Investigator Grade-II is in the Registrar General of India and sits the same Paper 2.

How is the JSO merit list prepared?

From Tier 2 marks only: Paper 1 Sections I and II (390 marks) plus Paper 2 (200 marks) — 590 marks in all. Tier 1 only shortlists you; its marks do not count. You must also clear the qualifying minimums in every Paper-1 section, the Computer module, DEST and Paper 2.

What is the salary of an SSC CGL JSO?

JSO is a Level 6 post, starting at ₹35,400 basic pay. The exact in-hand figure depends on city and allowances; see the SSC CGL salary 2026 note.

How many JSO vacancies are there in 2026?

SSC's tentative vacancy list (24 September 2026) gives 158 Junior Statistical Officer posts and 48 Statistical Investigator Grade-II posts. The list is tentative; the final vacancy position is fixed by SSC.

When is SSC CGL Tier 2 2026?

SSC has announced only "tentatively December 2026" — no date has been announced as of 6 November 2026.

Practice Next

• The other Tier-2 paper: SSC CGL AAO Mock Test Free (Assistant Audit Officer): Paper-3 Finance & Economics.
• Full pattern: SSC CGL syllabus 2026 and SSC CGL Tier 2 exam pattern 2026.
• Preparation plan: SSC CGL Tier 2 preparation strategy 2026.
• Formula revision: Statistics formulas for SSC CGL.
• All CGL mocks: SSC CGL mock test free.
• Post and pay: SSC CGL salary 2026 and SSC CGL cut-off.
• More free notes: All Study Notes

Sources: SSC Combined Graduate Level Examination 2026 notice (ssc.gov.in, 21 May 2026), Paras 13.9 and 16, as tabulated in the house syllabus and Tier-2 pattern notes; vacancy figures from SSC's tentative vacancy list (24 September 2026) as tabulated in the house vacancy note; question counts and topic counts enumerated from the test files listed above. As of 6 November 2026.