Calculation formula of digital currency weight
Weight formula:
can be the observation mean square error of the same quantity, or it can be the observation mean square error of different quantities, that is, the weight can reflect the accuracy between several observations of the same quantity, and also can reflect the accuracy between observations of different quantities
The weight calculation is that each value is multiplied by the corresponding weight, and then summed to get the total value, and then divided by the total number of units
The value ofweight is the weighted average value. The size of the value depends not only on the value of each unit (variable value) in the population, but also on the number of times (frequency) of each value. Because the number of times of each value plays a weighing role in the average, it is called weight
for example, the final evaluation is a comprehensive evaluation of students' usual performance, mid-term examination results and final examination results, but the proportion of these three results in the final evaluation is different
if the usual score accounts for 30%, the mid-term exam score accounts for 30%, and the final exam score accounts for 40%, then the final evaluation = usual score * 0.3 + mid-term exam score * 0.3 + final exam score * 0.4
extended data
weight is a relative concept, which is for a certain index. The weight of an index refers to the relative importance of the index in the overall evaluation. In the process of evaluation, weight is the quantitative distribution of the importance of different aspects of the object to be evaluated, and the role of each evaluation factor in the overall evaluation is treated differently. In fact, an evaluation without emphasis is not an objective evaluation
There are many forms of "weight" inweighted average. With the change of "right", the results will be quite different. People pay more and more attention to this particularity and its application will be more and more extensive
in our daily life, we often encounter the calculation of weighted average
For example, when applying for employment, college students will calculate their scores according to their professional knowledge, work experience and appearance image according to a certain weight, which uses the weighted average. The weighted average reflects the influence of the importance of each data in a group of data on the overall concentration trendin the weighted average. "Weight" has a clear meaning - it indicates the importance of a certain data in a group of data, so it is necessary to study the weighted average effect combined with specific cases
understand that the size of weighted average is not only related to each data in a group of data, but also affected by the weight of each data. The greater the weight. The greater the impact on the average effect. On the contrary, the smaller< br />
weight calculation refers to the scalar * the importance of the indicator in the whole sample or specified, and can also be directly understood as the percentage
extended data
weight is a relative concept for a certain indicator
the weight of an indicator refers to the relative importance of the indicator in the overall evaluation
in the process of evaluation, it is the quantitative distribution of the importance of different aspects of the evaluated object, and the role of each evaluation factor in the overall evaluation is treated differently
for example, the final evaluation is a comprehensive evaluation of the students' usual performance, midterm examination results and final examination results, but the proportion of these three results in the final evaluation is different. If the usual score accounts for 30%, the midterm exam score accounts for 30%, and the final exam score accounts for 40%, then the final evaluation = usual score * 0.3 + midterm exam score * 0.3 + final exam score * 0.4.
For example: a gives it 100 points, a's boss gives it 60 points, if the average is (100 + 60) / 2 = 80 points
but because what the boss said is heavier than a, if the weight of the boss is 2 and a is 1, then finding the average is the weighted average, and the result is (100 * 1 + 60 * 2) / (1 + 2) = 73.3 points, which obviously inclines to the boss
if the boss's weight is 3 and a's weight is 1, the result is (100 * 1 + 60 * 3) / (1 + 3) = 70, which is the calculation of the average according to different weights
the weight of an index refers to the relative importance of the index in the overall evaluation. The weight indicates that in the evaluation process, it is the quantitative distribution of the importance of different aspects of the evaluated object, and the role of each evaluation factor in the overall evaluation is treated differently. As a matter of fact, an evaluation without emphasis is not an evaluation of Rong Guan
extended data: the weight coefficient is related to the importance of the target. For different disciplines and different age stages, the importance of each index item is different in the weight coefficient selection table, so the weight coefficient of each index item must be reasonably specified according to the actual situation
weight of self weight: take weight as index score (or score), or take weight as grade score directly
Weighting: the weight set before the known score of each index(1) empirical method
by interviewing experienced experts and scholars, we can analyze which index is important and which is not so important based on their experience in practice, so as to determine the weight coefficient of these index items
(2) multi factor statistical method
design some questionnaire questions in advance, list each index item, check the most important, important and secondary important level for the respondents, and then make statistical calculation of the survey results, and determine the weight coefficient by the calculated ranking index wi
take bank of China as an example, the total equity of BOC is 253.8 billion shares, including 177.8 billion a shares. However, the shares held by Huijin holding and strategic investors will not be listed for a long time in the future. They belong to non freely tradable shares. Moreover, there are more than 3 billion allotment shares at the time of issuance, which belong to restricted shares, and they also belong to non freely tradable shares before their listing and circulation. Thus, only 3.45 billion freely tradable A shares of Bank of China are available, The free circulation volume is 3.45 billion shares, and the free circulation share capital of BOC only accounts for 1.94% of its total share capital. In other words, only 3.45 billion shares of BOC have been included in the calculation of CSI 300 index, so the proportion of BOC in CSI 300 index is far lower than other large cap stocks such as China Merchants Bank< br />
in mathematics, in order to show the importance of several quantities in the total amount, different proportion coefficients are given, which is called weighting
the Weighted Assignment coefficient is the weight, also known as weight, weight
there are two kinds of weights, namely, self weight and weighted weight
weight coefficient refers to the importance of an indicator item in the indicator item system. It refers to the influence of the change of this indicator item on the result when other indicators remain unchanged
the weight coefficient is related to the importance of the target. For different disciplines and different age stages, the importance of each index item is different, so the weight coefficient of each index item must be reasonably specified according to the actual situation
weight: the weight is used as the score (or score) of the index, or the weight is directly used as the score of the grade
weighting: the weight set before the known score of each indicator (i.e. weight of self weight)
(1) empirical method
by visiting experienced experts and scholars, we can analyze which indicators are important and which are not so important based on their experience in practice, so as to determine the weight coefficient of these indicators
(2) multi factor statistical method
design some questionnaire questions in advance, list all the indicators, check the most important, important and secondary important levels for the respondents, and then make statistical calculation of the survey results, and determine the weight coefficient by the calculated ranking index wi
the basic method of price index calculation is to divide the sum of the procts of various commodity prices and weights in the calculation period by the sum of the procts of various commodity prices and weights in the base period (that is, the ratio of the two sums). The proct of the price of all kinds of commodities in the calculation period and the weight of all kinds of commodities in the calculation period, minus the proct of the price of all kinds of commodities in the base period and the sales volume of all kinds of commodities in the base period, indicates the amount saved or overpaid by consumers when purchasing commodities in the calculation period e to price changes
in practical work, according to the information available, the price index can also be calculated by arithmetic mean or harmonic mean
in terms of calculation method, the price index of a single commodity is calculated with the actual average prices of the reporting period and the base period. The general (Group) price index of various commodities is generally calculated by taking the sales (or purchase) quantity of commodities in the reporting period as the same measurement factor (see statistical index). The formula of total price index k is:
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where k represents the sales (or acquisition) quantity of various commodities in the reporting period; P1 and P0 represent the average price of each commodity in the report period and base period respectively. In most cases, the representative price of each commodity is selected. The above formula is referred to as the composite formula of price index. In practice, some simplified methods can be adopted according to the data.