In the simplest case, you select one period to represent the base period. Suppose the value of the variable for this period is V.
The index is calculated by multiplying the value for each period by 100/V. This results in the base period having an index of 100 and all the other periods are represented by their percentage relative to the base period.
Things get more complicated when you consider (mainly) economic index numbers such as price indices. A simplistic description of a price index is as follows: identify a "basket" of goods and services that the price index is required to cover. Calculate a price index for each item using the same base year. Then calculate the weighted average of these indices, where the weights reflect the importance of the goods in the total spend - either in the base period or the current period.
what are the problems associated with the construction of index numbers
uses of index
Coordinate index ? Sure ! It's easy ... You just have to coordinate your index number !
The stock exchange index is a relative measure of the performance of all or a number of stocks that are traded on a stock exchange. it incorporates the return on stocks, their volumes traded and the shares outstanding. there can be a number of indices relating to a single stock exchange that incorporates the returns on a number of companies. they can also be differentiated on the basis of the return on different industries.
index is the same as power The index of a number say how many times you have to use the number in a multiplictaion. e.g; 2 10 = 10*10=100
Where can I find a list of the Uniform Construction Index?
what are the problems associated with the construction of index numbers
what is index number
uses of index
Method related charges
To get index number trend analysis, you need a set of data points representing the index numbers over a specific time period. Plotting the data on a graph will allow you to visually analyze the trend. Additionally, you can calculate the average change in index numbers over time using a formula such as the percent change formula or the moving average method to identify the direction and rate of the trend.
Its Postal Index Number and for mobile its Personal Identity Number.
Steps or Problems in the Construction of Price Index Numbers The construction of the price index numbers involves the following steps or problems: 1. Selection of Base Year: The first step or the problem in preparing the index numbers is the selection of the base year. The base year is defined as that year with reference to which the price changes in other years arc compared and expressed as percentages. The base year should be a normal year. In other words, it should be free from abnormal conditions like wars, famines, floods, political instability, etc. Base year can be selected in two ways: (a) through fixed base method in which the base year remains fixed; and (b) through chain base method in which the base year goes on changing, e.g., for 1980 the base year will be 1979, for 1979 it will be 1978, and so on. 2. Selection of Commodities: The second problem in the construction of index numbers is the selection of the commodities. Since all commodities cannot be included, only representative commodities should be selected keeping in view the purpose and type of the index number. In selecting items, the following points are to be kept in mind: (a) The items should be representative of the tastes, habits and customs of the people. (b) Items should be recognizable, (c) Items should be stable in quality over two different periods and places. (d) The economic and social importance of various items should be considered (e) The items should be fairly large in number, (f) All those varieties of a commodity which are in common use and are stable in character should be included, 3. Collection of Prices: After selecting the commodities, the next problem is regarding the collection of their prices: (a) from where the prices to be collected; (b) whether to choose wholesale prices or retail prices; (c) whether to include taxes in the prices or not etc. While collecting prices the following points are to be noted: (a) prices are to be collected from those places where a particular commodity is traded in large quantities, (b) Published information regarding the prices should also be utilized, (c) In selecting individuals and institutions who would supply price quotations, care should be taken that they are not biased. (d) Selection of wholesale or retail prices depends upon the type of index number to be prepared. Wholesale prices are used in the construction of general price index and retail prices are used in the construction of cost-of-living index number, (e) Prices collected from various places should be averaged. 4. Selection of Average: Since the index numbers are, a specialized average, the fourth problem is to choose a suitable average. Theoretically, geometric mean is the best for this purpose. But, in practice, arithmetic mean is used because it is easier to follow. 5. Selection of Weights: Generally, all the commodities included in the construction' of index numbers are not of equal importance. Therefore, if the index numbers are to be representative, proper weights should be assigned to the commodities according to their relative importance. For example, the prices of books will be given more weightage while preparing the cost-of-living index for teachers than while preparing the cost-of-living index for the workers. Weights should be unbiased and be rationally and not arbitrarily selected. 6. Purpose of Index Numbers: The most important consideration in the construction of the index numbers is the objective of the index numbers. All other problems or steps are to be viewed in the light of the purpose for which a particular index number is to be prepared. Since, different index numbers are prepared with specific purposes and no single index number is 'all purpose' index number, it is important to be clear about the purpose of the index number before its construction.
Drafting
disadvantages of index numbers
The most common method is weaving. However in many places fabric construction is done by hand by using knitting.
The first number of a yarn count (D) generally indicates the fineness of the yarn (how thick it is). The second number (F) indicates the fluffiness or hairiness of the yarn. The last number indicates the number of plies in the yarn. Example: 75D/72F/2 is a 75 denier (75 g/9000m), 2-ply yarn with a hairiness or fluff index of 72. The fluff index becomes important in weaving where it can change the optical effects of the woven fabric. There are several different systems for measuring yarn hairiness. The F-index method appears to be from a patented Japanese method of measurement.