Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Statistics - Algebra - Mathematics previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Statistics. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| KCET 2025 | 2025 | 1 | View paper |
| KCET 2024 | 2024 | 1 | View paper |
| KCET 2023 | 2023 | 1 | View paper |
| KCET 2022 | 2022 | 1 | View paper |
| KCET 2021 | 2021 | 1 | View paper |
| KCET 2020 | 2020 | 1 | View paper |
| KCET 2019 | 2019 | 1 | View paper |
| KCET 2018 | 2018 | 1 | View paper |
| KCET 2017 | 2017 | 1 | View paper |
Practice every matching question in batches of 20, with every available option.
Mean and standard deviation of 100 items are 50 and 4 , respectively. The sum of all squares of the items is
The standard deviation of the data 6, 7, 8, 9, 10 is
The standard deviation of the numbers \(31,32,33 \ldots 46,47\) is
If the standard deviation of the numbers \(-1, 0,1, k\) is \(\sqrt{5}\) where \(k>0\), then \(k\) is equal to
The mean of 100 observations is 50 and their standard deviation is 5. Then, the sum of squares of all observations is
Let $a, b, c, d$ and $e$ be the observations with mean $m$ and standard deviation $S$. The standard deviation of the observations $a+k$, $b+k, c+k, d+k$ and $e+k$ is
The mean deviation about the mean for the date $4,7,8,9,10,12,13,17$ is