NCERT Exemplar Solutions
Class 11 - Mathematics - Chapter 15: STATISTICS

Fill in the Blanks

Coefficient of variation = ____ × 100 / Mean

If \( \bar{x} \) is the mean of n values of x, then \( \sum (x_i - \bar{x}) \) is always equal to ____.

If a has any value other than \( \bar{x} \), then \( \sum (x_i - \bar{x})^2 \) is ____ than \( \sum (x_i - a)^2 \).

If the variance of a data is 121, then the standard deviation of the data is ____.

The standard deviation of a data is ____ of any change in origin, but is ____ on the change of scale.

The sum of the squares of the deviations of the values of the variable is ____ when taken about their arithmetic mean.

The mean deviation of the data is ____ when measured from the median.

The standard deviation is ____ to the mean deviation taken from the arithmetic mean.