Index

A variable that is determined by dividing one measurement by another, and it is usually expressed as a percentage. Indices can be used to show variations over time, by comparing subsequent measurements of a variable with an initial measurement (an index of 100 indicates no change).

Indices can also show the relative incidence of a particular characteristic in two samples, by dividing the percentage of one sample by the other, indices of 120 and over or 80 and below generally indicate above-average and below-average skews respectively.

What is an index in market research?

Index number development is a basic marketing tool. The Index Number. Index numbers are statistics used for comparing. product usage with a population base, to better understand the ratio and/or relationship between the population and the usage of a particular product or service.

What is the market index and how it is calculated?

A stock index or stock market index is a measurement of the value of a section of the stock market. It is computed from the prices of selected stocks (typically a weighted average). The market capitalization is then multiplied to the free-float factor to derive the free-float market capitalization.

What does index mean in advertising?

In its most basic form, Composition Index measures the concentration of a particular target group of consumers on a given website or ad network, compared to the concentration of that target in the total Internet population.

What is the difference between an index and a scale?

An index really just means that it is a measurement that is constructed by summing up other, simpler, measurements. A scale is an index that in some sense only measures one thing. For example, a final exam in a given course could be thought of as a scale: it measures competence in a single subject.