UPSC Indian Statistical Service (Prelims-style) — Free Online Mock Test
UPSC Indian Statistical Service (Prelims-style) · MCQ. India examination. · Official language: English.
UPSC Indian Statistical Service exam at a glance
UPSC Indian Statistical Service key facts & eligibility
| Conducting body | Union Public Service Commission (UPSC), Government of India (conducted as the combined Indian Economic Service / Indian Statistical Service Examination). |
|---|---|
| Official website | upsc.gov.in ↗ |
| Mode | Offline, pen-and-paper — OMR answer sheets for the objective papers and written answer booklets for the descriptive papers, followed by an interview (viva voce). |
| Frequency | Held once a year. |
| Scoring & marking | A written examination of 1000 marks over six papers — General English (100, descriptive), General Studies (100, descriptive), Statistics-I and Statistics-II (200 each, objective, with 1/3 negative marking), and Statistics-III and Statistics-IV (200 each, descriptive) — plus a viva voce / personality test (about 200 marks). Selection is merit-based against available vacancies, so there is no fixed pass mark. |
| Language | English. |
Who is eligible for UPSC Indian Statistical Service?
A bachelor’s degree with Statistics / Mathematical Statistics / Applied Statistics as a subject, or a master’s degree in Statistics / Mathematical Statistics / Applied Statistics, from a recognised university. (Statistics studied only as a minor component of a course does not qualify.) Age limits apply but are not evergreen.
Last verified July 2026 against UPSC — official portal. Always confirm current details on the official website before you register.
UPSC Indian Statistical Service section breakdown
The UPSC Indian Statistical Service mock test on Wrexa Edge replicates the real exam's section structure — same names, same question count per section, same time limits. No inter-section breaks — the timer runs continuously.
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UPSC Indian Statistical Service (55 Q)
UPSC Indian Statistical Service scoring & marking scheme
Strategy: UPSC Indian Statistical Service has no negative marking. Attempt every question — blank answers cost you potential marks but cannot pull your score down.
Scale: UPSC Indian Statistical Service (pass 700/1000).
How UPSC Indian Statistical Service is conducted
- Mode
- Test format
- Backtracking
- Mark for review
UPSC Indian Statistical Service time strategy
With 55 questions in 120 minutes, you have about 131 seconds per question on average. Successful candidates aim for the following pacing on each section:
- UPSC Indian Statistical Service (55 Q)
Wrexa Edge's analytics show your actual time-per-question after every mock so you can spot which sections you're losing time on.
UPSC Indian Statistical Service topics covered
Across the 50 Wrexa Edge variants of UPSC Indian Statistical Service, the following topics appear most often (sample distribution from one variant):
UPSC Indian Statistical Service (55 Q)
- Statistics — Percentages · 6
- Statistics — Probability · 6
- Statistics — Median · 6
- Stats — Dispersion · 6
- Statistics — Mean · 5
- Stats — Correlation · 4
- Stats — Central Tendency · 3
- Stats — Skewness · 2
UPSC Indian Statistical Service difficulty calibration
Elite tier. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months.
UPSC Indian Statistical Service (Prelims-style) · MCQ. India examination. · Official language: English.
Verified content — Wrexa Edge's UPSC Indian Statistical Service bank has been deeply curated with real exam-aligned content (estimated 100% syllabus coverage).
How Wrexa Edge prepares you for UPSC Indian Statistical Service
- Real test-day interface
- 50 distinct variants
- Detailed analytics
- Spaced repetition (Notebook)
- Optional proctoring
- Free to start
Expert take: what UPSC Indian Statistical Service really tests
The UPSC Indian Statistical Service (ISS) Examination recruits statisticians into the Government of India, conducted annually as the combined IES/ISS exam. It is a six-paper written examination of 1000 marks (General English and General Studies plus four Statistics papers) followed by an interview, with merit-based selection.
Preparation tips
- Build a rigorous statistics core (probability, distributions, inference, sampling, econometrics, design of experiments) using Gupta-Kapoor and Rohatgi.
- Practise both objective speed (Statistics-I/II — mind the negative marking) and descriptive answer-writing (Statistics-III/IV).
- Do not neglect General English and General Studies, which carry 200 marks and are easy to under-prepare.
⚠️ Common mistakes to avoid
- Assuming any degree qualifies — Statistics / Mathematical Statistics / Applied Statistics must be an actual subject, not an incidental module.
- Over-focusing on Statistics and skipping General Studies/English, which drag down the overall merit rank.
UPSC Indian Statistical Service study plan
A phase-by-phase roadmap from your first concept to test-ready. Stretch or compress each phase to fit the time you have before your attempt.
- Build a rigorous statistics base (probability, distributions, inference, sampling, econometrics, design of experiments)
- Study from Gupta & Kapoor and Rohatgi
- Make concise formula/theory notes
- Practise objective speed for Statistics-I/II — and mind the 1/3 negative marking
- Rehearse descriptive answer-writing for Statistics-III/IV
- Cover advanced topics across all four Statistics papers
- Do not neglect General English and General Studies (200 marks combined)
- Solve UPSC previous years’ ISS papers under time
- Prepare for the viva voce / personality test
Where UPSC Indian Statistical Service can take you
A strong UPSC Indian Statistical Service result opens up these careers and higher-study paths:
- Indian Statistical Service officer
- Official statistics & policy
- Government analytics career
Best books & official prep for UPSC Indian Statistical Service
- Fundamentals of Mathematical Statistics — S. C. Gupta & V. K. Kapoor
- Fundamentals of Applied Statistics — S. C. Gupta & V. K. Kapoor
- An Introduction to Probability Theory and Mathematical Statistics — V. K. Rohatgi
- Fundamentals of Statistics (Vols I & II) — Goon, Gupta & Dasgupta
- Sampling Techniques — William G. Cochran
Official practice: UPSC publishes the official ISS syllabus and previous years’ question papers on upsc.gov.in.
Previous-year papers: UPSC publishes previous years’ ISS question papers on its official website.
Frequently asked questions
- What is the UPSC Indian Statistical Service exam pattern?
- UPSC Indian Statistical Service (Prelims-style) contains 55 questions across 1 section: UPSC Indian Statistical Service (55 Q). Total duration is 120 minutes (about 131 seconds per question).
- Does UPSC Indian Statistical Service have negative marking?
- No — UPSC Indian Statistical Service has no negative marking. Each correct answer is worth 1 mark, so attempt every question.
- How is UPSC Indian Statistical Service scored?
- Scaled score range: 100 to 1000. UPSC Indian Statistical Service (pass 700/1000).
- How can I practise UPSC Indian Statistical Service online for free?
- Wrexa Edge gives you 10 free full-length UPSC Indian Statistical Service mock tests — with instant scoring, detailed explanations and analytics — plus 40 more with Pro. Start practising in under a minute, no card required.
- What is the difficulty level of UPSC Indian Statistical Service?
- UPSC Indian Statistical Service is rated Elite difficulty on Wrexa Edge. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months. UPSC Indian Statistical Service (Prelims-style) · MCQ. India examination. · Official language: English.
- How long is the UPSC Indian Statistical Service exam?
- UPSC Indian Statistical Service runs for 120 minutes total. On Wrexa Edge the timer is enforced exactly as on the real exam — including no inter-section breaks.
- What topics are covered in UPSC Indian Statistical Service?
- UPSC Indian Statistical Service is split into: UPSC Indian Statistical Service (55 Q). Each section is timed and weighted separately. UPSC Indian Statistical Service (Prelims-style) · MCQ. India examination. · Official language: English.
- What tools or aids are allowed during UPSC Indian Statistical Service?
- No special tools are required. Note: real exam is proctored — Wrexa Edge mirrors this with a webcam-based proctoring flow you can enable.
- Is the UPSC Indian Statistical Service test adaptive?
- No — UPSC Indian Statistical Service is a fixed-form (linear) test. Every candidate sees the same number of questions per section.
- How many UPSC Indian Statistical Service mock tests does Wrexa Edge offer?
- Wrexa Edge generates 50 distinct UPSC Indian Statistical Service variants — each with different question content, not just shuffled options — the first 10 free for everyone and 40 more with Pro. That's 2750 unique practice questions in the real test-day interface.
- Is there a free UPSC Indian Statistical Service test series 2026?
- Yes. The Wrexa Edge UPSC Indian Statistical Service test series for 2026 gives you 10 free full-length mock tests (50 in total) plus subject-wise and topic-wise tests — instant scoring and detailed analysis, no card required.
- Are UPSC Indian Statistical Service previous year question–style papers included?
- Every UPSC Indian Statistical Service mock is modelled on the official exam pattern and the style of previous years' papers — the same 55-question structure, sections and marking — so your practice mirrors the real paper you'll sit.
- Which is the best free UPSC Indian Statistical Service mock test online?
- Wrexa Edge's UPSC Indian Statistical Service mock test replicates the real exam interface, timing and marking scheme, with instant score, section-wise analysis and 50 fresh variants — a strong free choice for 2026 preparation.
- Can I take the UPSC Indian Statistical Service mock test on mobile?
- Yes. UPSC Indian Statistical Service mock tests run in any browser on mobile, tablet or desktop — no app or download needed. Start on your phone and your progress and analytics sync when you sign in.
- What is the UPSC Indian Statistical Service syllabus?
- The UPSC Indian Statistical Service syllabus maps to its 1 section: UPSC Indian Statistical Service (55 Q). Wrexa Edge's mock tests cover the complete syllabus topic by topic — see the topics-covered breakdown above — so you practise every area at real exam difficulty.
- What is the eligibility for UPSC Indian Statistical Service?
- Eligibility for UPSC Indian Statistical Service — age, qualification and number of attempts — is set by the official conducting body and can change each cycle, so always confirm the current official notification before applying. Wrexa Edge focuses on realistic UPSC Indian Statistical Service practice: 10 free full-length mocks in the exact exam pattern, ready whenever you are.
- When is the UPSC Indian Statistical Service exam and how should I prepare?
- Official UPSC Indian Statistical Service exam dates are announced by the conducting body for each cycle — check the latest notification for the current schedule. To be ready, follow a phased study plan and take full-length timed mocks; Wrexa Edge gives you 10 free UPSC Indian Statistical Service mocks with instant scoring so you can track your readiness week by week.
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