The variance and mean of $15$ observations are respectively $6$ and $10$. If each observation is increased by $8$,then the new variance and new mean of the resulting observations are respectively:
- A$14, 10$
- B$14, 18$
- C$6, 18$
- D$6, 10$
Explore More
Similar Questions
The arithmetic mean of marks in Mathematics for four divisions $A, B, C$ and $D$ were $80, 75, 70$ and $72$ respectively. Their standard deviations were $12, 6, 8$ and $10$ respectively. Then,which division has more uniformity?
If the coefficient of variation and variance of a frequency distribution are $7.2$ and $3.24$ respectively,then its mean is
Find the coefficient of variation of the first $n$ natural numbers.
Medium
View SolutionIf variables $x$ and $u$ are related by $u = \frac{x - a}{h}$,then the correct relationship between $\sigma_x$ and $\sigma_u$ is:
Easy
View SolutionThe standard deviation of the following distribution is:
$C$.$I$. $0$ - $6$ $6$ - $12$ $12$ - $18$ f_i $2$ $4$ $6$
| $C$.$I$. | $0$ - $6$ | $6$ - $12$ | $12$ - $18$ |
| f_i | $2$ | $4$ | $6$ |
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo