Find the range and mode of the data 17, 18, 28, 19, 16, 18, 17, 29, 18

Find the standard deviation of {11, 7, 10,13, 9}

A table tennis player, lost 12 games out of 18 games played. Calculate the games won in terms of decimal.

A sequence a, ax, ax2, ......, axn, has odd number of terms. Then the median is

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

If the standard deviation of a population is 3, what would be the population variance?

The variance of a set of data is 169. Then the standard deviation of the data is

If the standard deviation of a population is 10, what would be the population variance?

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is