Mathematics - Statistics
Practise 4 IAT (IISER) previous year questions on Statistics, compiled from papers spanning 2019 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.
Statistics has been asked in 4 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 4 questions in all. 0% of them were easy, 75% moderate and 25% tough. Most of its questions came from 2026, with 1 question that year. In the last three years (2023–2026) it had 2 questions across 3 papers, about 0.7 per paper.
The chapter's 3 topics are not weighted equally: Mean (2 questions, 50%), Statistics (1 question, 25%), and Measures of Dispersion (1 question, 25%) have been asked the most. Over the last five years the most frequent topics have been Statistics (1) and Measures of Dispersion (1). Statistics has produced the most tough questions (1).
- 1Consider the data of scores obtained by students in an examination. If the score of every student is increased by 2 marks, then which of the2026Measures of Dispersion
- 2Suppose the mean and the standard deviation of the data are and , respectively. After including one more data value , the mean of the data r2023Statistics
- 3Consider the two data sets Let and be the means and the variances of and , respectively. Then, which of the following relations is correct?2021Mean
- 4What is the mean deviation about the mean for the following data?2019Mean
Frequently Asked Questions
1.How many questions are available for Statistics?
This chapter includes 4 questions compiled from IAT (IISER) papers spanning 2019 to 2026.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) questions specifically for the Statistics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Statistics an important chapter for IAT (IISER) Mathematics?
Statistics has appeared in 4 of the 10 years of IAT (IISER) papers covered here, with 4 questions across 4 papers - about one per paper it appears in.
4.What is the difficulty level of Statistics questions in IAT (IISER)?
Of the 4 questions analysed for this chapter, 0% are easy, 75% moderate and 25% tough. 2026 had the most, with 1 question.
5.Which topics in Statistics should I focus on?
These topics have carried the most weightage in Statistics:
- Mean - 2 questions (50%)
- Statistics - 1 question (25%)
- Measures of Dispersion - 1 question (25%)
- Statistics has produced the most tough questions (1).
6.Is Statistics's weightage in IAT (IISER) going up or down?
Across all 4 papers analysed, Statistics has averaged about 1.0 questions per paper. In the last three years (2023–2026), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.