Related InterviewSolutions

• The median of the following marks of `9` students in a class, is `34,32,48,38,24,30,27,21,35`A. 32B. 34C. 38D. 30
• Compute the geometric mean of 2, 4, 8.
• If the mean of a set of observations `x_(1),x_(2), …,x_(n)" is " bar(X)`, then the mean of the observations `x_(i) +2i , i=1, 2, ..., n` isA. `bar(X) +2`B. `bar(X) +2n`C. `bar(X)+(n+1)`D. `X+n`
• If the arithmetic mean of the observations `x_1,x_2,x_3,.............x_n` is `1`, then the arithmetic mean of `x_1/k,x_2/k,x_3/k,.............x_n/k , (k >0)` isA. greater than 1B. Less than 1C. equal to 1D. none of these
• The A.M. of the series `1, 2, 4, 8, 16,.....,2^n` is -A. `(2^(n)-1)/(n)`B. `(2^(n+1)-1)/(n+1)`C. `(2^(n)+1)/(n)`D. `(2^(n)-1)/(n+1)`
• The mean of the series `x_1, x_2,...x_n` is `barX`. If `x_2` is replaced by `lambda` then the new mean isA. `bar(X) + x_(2) + lambda`B. `(bar(X)-x_(2)-lambda)/(n)`C. `((n-1)bar(X)+lambda)/(n)`D. `(n bar(X)-x_(2)+lambda)/(n)`
• The mean of discrete observations `y_(1), y_(2), …, y_(n)` is given byA. `(sum_(i=1)^(n) y_(i)f_(i))/(sum_(i=1)^(n)f_(i))`B. `(sum_(i=1)^(n) y_(i)f_(i))/(n)`C. `(sum_(i=1)^(n) y_(i))/(n)`D. `(sum_(i=1)^(n) y_(i))/(sum_(i=1)^(n)i)`
• The geometric mean of numbers `7, 7^(2),7^(3),…,7^(n),` isA. `7^(7//4)`B. `7^(4//7)`C. `7^((n-1)/(2))`D. `7^((n+1)/(2))`
• The mean of the distribution, in which the values of X are 1, 2, ..,n the frequency of each being unity is :A. `(n(n+1))/(2)`B. `(n)/(2)`C. `(n+1)/(2)`D. none of these
• If the mean of n observations `x_1,x_2,x_3...x_n` is `barx` then the sum of deviations of observations from mean is