Statistics
What is the range of the data set: 14, 18, 9, 23, 31, 40, 5?
Which of the following is not a measure of dispersion?
The sum of the squares of the deviations of the observations from their mean is always:
What is the mean deviation about the mean for the data: 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21, 11?
If the variance of a data set is 16, what is its standard deviation?
What is the coefficient of variation if the standard deviation is 5 and the mean is 20?
For the first n natural numbers, the mean deviation about the mean when n is even is given by:
What is the variance of the first 10 natural numbers?
If each observation in a data set is increased by 5, then the variance of the new data set:
If each observation of a data set is multiplied by 2, then the standard deviation of the new data set:
What is the mean deviation about the median for the data: 6, 7, 10, 12, 13, 4, 12, 16?
Which measure of dispersion is most affected by extreme values?
If the coefficient of variation is 60 and the standard deviation is 21, what is the arithmetic mean?
What is the variance of the data: 6, 7, 10, 12, 13, 4, 12, 16?
Which of the following statistics is free from units of measurement?
If two distributions have the same mean and their standard deviations are 3 and 5 respectively, which distribution is more variable?
What is the mean deviation about the mean for the first n natural numbers when n is odd?
The root mean square deviation from the mean is known as:
If the mean of 5 observations is 7 and their variance is 8, and if each observation is multiplied by 3, what is the variance of the new observations?
What is the range of the data set: 14, 18, 22, 9, 15, 27?
The sum of deviations of a set of n observations $x_1, x_2, ..., x_n$ from their mean $\bar{x}$ is always:
Variance of the data 6, 8, 10, 12, 14 is:
Standard deviation is the ______ of variance.
Which measure of dispersion is independent of the unit of measurement?
If the standard deviation of a population is 6, what is the variance?
The formula for Mean Deviation about Median for ungrouped data is:
For two series, if coefficient of variation of the first series is 60% and that of the second is 40%, then:
What is the mean of the first n natural numbers?
The coefficient of variation is calculated using the formula:
If $\sum (x_i - \bar{x})^2 = 70$, $n = 10$, then the standard deviation is:
Which of the following is an alternative formula for variance $\sigma^2$?
For a frequency distribution, the mean deviation about mean is given by:
What is the main drawback of range as a measure of dispersion?