MCQ 11 MarkIf a range is divided into classes $5-10,10-15,15-20,$ $20-25,25-30$ and $30-35,$ then the range of the series will be :A5✓30C35D10AnswerCorrect option: B. 30BView full question & answer→
MCQ 21 MarkIf the median of a distribution is $8$ and the mean deviation from the median is $64.8,$ the coefficient of mean deviation will be :✓8.1B81C810D0.81AnswerCorrect option: A. 8.1AView full question & answer→
MCQ 31 MarkIf A is the mean from which the mean deviation is taken, then the coefficient of mean deviation is :✓$\frac{\text { Mean deviation }}{ A }$B$\frac{\bar{x}}{\sigma}$C$\frac{\sigma}{x}$D$\frac{ A }{\text { Mean deviation }}$AnswerCorrect option: A. $\frac{\text { Mean deviation }}{ A }$AView full question & answer→
MCQ 41 MarkThe assumed mean of a distribution is $a$ and Arithmetic mean is $\bar{x},$ then its variance is :A$\frac{\sum f_i\left(x_i-a\right)^2}{N}$B$\sqrt{\frac{\sum f_i\left(x_i-a\right)^2}{N}}$✓$\frac{\sum f_i\left(x_i-\bar{x}\right)^2}{N}$D$\frac{\sum f_i\left(x_i-\bar{x}\right)}{ N }$AnswerCorrect option: C. $\frac{\sum f_i\left(x_i-\bar{x}\right)^2}{N}$CView full question & answer→
MCQ 51 MarkIf mean of $6,10,4,7, x$ and $5$ be $6,$ then the value of $x$ will be :A5B32C36✓4AnswerCorrect option: D. 4DView full question & answer→
MCQ 61 MarkIf in a group of data the sum of squares deviations from the arithmetic mean is 605 and the number of terms is 5, then the standard deviation will be :A10B2✓11D5AnswerCorrect option: C. 11CView full question & answer→
MCQ 71 MarkIf the assumed mean of a distribution is $a$ and arithmetic mean is $\bar{x}$, then its standard deviation will be :✓$\sqrt{\frac{\sum f_i\left(x_i-\bar{x}\right)^2}{N}}$B$\frac{\sum f_i\left(x_i-a\right)^2}{N}$C$\frac{\sum f_i\left(x_i-a\right)^3}{N}$D$\frac{\sum f_i\left(x_i-\bar{x}\right)^3}{N}$AnswerCorrect option: A. $\sqrt{\frac{\sum f_i\left(x_i-\bar{x}\right)^2}{N}}$AView full question & answer→
MCQ 81 MarkIn a group of data the sum of absolute values of deviations from the arithmetic mean is 256 and the number of terms is 4, then the mean deviation is :A8B1024✓64D16AnswerCorrect option: C. 64CView full question & answer→
MCQ 91 MarkThe variance of marks of students of class is $2.56,$ then the standard deviation of this distribution is :A2.56✓1.6C$\frac{1}{2.56}$D$(2.56)^2$AnswerCorrect option: B. 1.6BView full question & answer→
MCQ 101 MarkIf arithmetic mean of a distribution be $\bar{x},$ then its mean deviation is :A$\frac{\sum f_i\left(x_i-\bar{x}\right)}{ N }$B$\Sigma f_i\left|x_i-\bar{x}\right|$✓$\frac{\Sigma f_i\left|\left(x_i-\bar{x}\right)\right|}{ N }$D$\frac{\sum f_i\left|x_i-\bar{x}\right|^2}{N}$AnswerCorrect option: C. $\frac{\Sigma f_i\left|\left(x_i-\bar{x}\right)\right|}{ N }$CView full question & answer→
MCQ 111 MarkIn a series $\Sigma x^2=100, n=5$ and $\Sigma x=20,$ then variance :A16✓4C2D8AnswerCorrect option: B. 4BView full question & answer→
MCQ 121 MarkIf standard deviation $\sigma=\sqrt{\frac{\sum f d^2}{N}-\left(\frac{\sum f d}{30}\right)^2},$ then the value of N is :A10✓30C15D20AnswerCorrect option: B. 30BView full question & answer→
MCQ 131 MarkIf the standard deviation of marks of students of a class is $1.6,$ then the variance of the distribution will be :A1.6B0.4✓2.56D$(2.56)^2$AnswerCorrect option: C. 2.56CView full question & answer→
MCQ 141 MarkWhat is the standard deviation of the data $6,10,4,7$, 4 and $5?$✓$\sqrt{\frac{13}{3}}$B$\frac{13}{3}$C$\sqrt{26}$D$\frac{\sqrt{26}}{6}$AnswerCorrect option: A. $\sqrt{\frac{13}{3}}$AView full question & answer→
MCQ 151 MarkMean of variable series $\bar{x}=773$ and mean deviation $64.4,$ then coefficient of mean deviation is :✓0.083B0.073C0.065D12.003AnswerCorrect option: A. 0.083AView full question & answer→
MCQ 161 MarkMarks of five students in statistics are $20,35,25,30$ and $15.$ Find out range :A15✓20C25D30AnswerCorrect option: B. 20BView full question & answer→