Question

explain the following? a)geometric mean b) standard deviation c)skewness

Answer 1

a. Geometric mean - The central number in a geometric progression ( e.g. 9 in 3, 9, 27 ), also calculable as the nth root of a product of n numbers.

b. Standard deviation - A quantity expressing by how much the members of a group differ from the mean value for the group.

Answer 2

Geometric mean ,standard deviation and skewness

Explanation:

a)Geometric mean

Geometric mean is a mean or average, which indicates the central tendency or typical value of a set of numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum).

b) Standard deviation

Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean), or expected value. A low standard deviation means that most of the numbers are close to the average. A high standard deviation means that the numbers are more spread out.

c) Skewness

Skewness refers to distortion or asymmetry in a symmetrical bell curve, or normal distribution, in a set of data. If the curve is shifted to the left or to the right, it is said to be skewed. Skewness can be quantified as a representation of the extent to which a given distribution varies from a normal distribution

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