Goodmarks

Mathematics · JEE

Important Questions: Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data for JEE

12+ syllabus-aligned questions available

Quick answer

The most important Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data questions for JEE cover conceptual traps, standard results, and numerical patterns from Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data. Goodmarks provides 12+ high-yield MCQs with full solutions.

Focus on what matters most. These important Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data questions cover high-weightage concepts from Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data — the topics JEE repeats every year.

Syllabus context

Part of Statistics and Probability in JEE Main Mathematics.

Free sample questions

Attempt 8 free MCQs for Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data. Unlock 4+ more with Pro.

Unlock full bank
Q1MathsUnit 13: Statistics and Probability
In an experiment with 15 observations on x,x, then following results were available: ∑x2=2830,∑x=170\sum x^{2}=2830, \sum x=170 One observation that was 20 was found to be wrong and was replaced by the correct value 30.30 . Then the corrected variance is:
Q2MathsUnit 13: Statistics and Probability
Find variance for following data:  Class 0−10−20−3010203040\begin{array}{lllll}\text { Class } & 0- & 10- & 20- & 30 \\ & 10 & 20 & 30 & 40\end{array} frequency ey 6 8
Q3MathsUnit 13: Statistics and Probability
The variance of observations 112,116,120,125,132 is
Q4MathsUnit 13: Statistics and Probability
The variance of the data 6,8,10,12,14,16,18,20,22,24 is
Q5MathsUnit 13: Statistics and Probability
Variance remains unchanged by change of
Q6MathsUnit 13: Statistics and Probability
The ages (in years) of a family of 6 members are 1,5,12,15,38 and 40 The standard deviation is found to be 15.9 After 10 years the standard deviation is
Q7MathsUnit 13: Statistics and Probability
Which of the following are dimensionless
Q8MathsUnit 13: Statistics and Probability
Assertion If rxy\boldsymbol{r}_{\boldsymbol{x} \boldsymbol{y}} i.e. r(x,y)=0.25,σx=0.1,σy=\boldsymbol{r}(\boldsymbol{x}, \boldsymbol{y})=\mathbf{0 . 2 5}, \boldsymbol{\sigma}_{\boldsymbol{x}}=\mathbf{0 . 1}, \boldsymbol{\sigma}_{\boldsymbol{y}}= 4,4, then byx=10b_{y x}=10 Reason byx=rσyσx\boldsymbol{b}_{\boldsymbol{y} \boldsymbol{x}}=\boldsymbol{r} \frac{\boldsymbol{\sigma}_{\boldsymbol{y}}}{\boldsymbol{\sigma}_{\boldsymbol{x}}}

Want unlimited Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data practice?

Pro unlocks the full question bank, topic filters, and attempt history.

Get started freeView Pro plans

Popular questions in Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data

Frequently asked questions

What makes a Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Statistics and Probability are high-weightage?

Key areas include Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data. Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.

Related topics