Question

1. The ages of 10 randomly selected students from a class are 21, 19, 27, 21, 29, 19, 25, 21, 23, and 30 years, respectively. Find: a) The mean age b) The median c) The mode d) Mean deviation and CMD e) The variance f) The standard deviation g) Coefficient of variation​

Answer 1

Here are the statistical measures for the given ages:

a) The mean age is 23.5 years.

b) The median age is 22 years.

c) The mode (most common age) is 21 years.

d) The mean deviation is 3.4 years. (CMD is not a standard abbreviation in statistics, so I'm not sure what it refers to. If you meant the coefficient of mean deviation, it would be the mean deviation divided by the mean, or approximately 0.145.)

e) The variance, a measure of how spread out the ages are, is approximately 16.28 years squared.

f) The standard deviation, another measure of spread, is approximately 4.04 years.

g) The coefficient of variation, which measures relative variability, is approximately 17.18%.