There are two methods of ring comparison: ring comparison growth rate and ring comparison development rate.
Compared with the previous period.
Chain growth rate = (current period-previous period)/previous period * 100%
Reflect how much this period has increased compared with the previous period.
Serial development speed = current period/previous period * 100%
Reflect how much this period has increased compared with the previous period.
For example, the current sales volume is 5 million, and the previous sales volume was 3.5 million.
Chain growth rate = (500-350)/350 *100% = 42.86%
Chain development speed = 500/350 *100% =142.86%
Weighting (find a few elite posts for reference)
To understand the meaning of weighting, we need to understand the meaning of "weight" first. The ancient meaning of "weight" is weight, which is an iron knot that can slide on the scale to observe the quality. "Mencius Hui Liang Wang Shangshang" said: "Powerful people know the weight." That's what it means.
For example, when the school calculates the final grade, the mid-term exam accounts for 30%, the final exam accounts for 50%, and the homework accounts for 20%. If someone takes a midterm exam of 84 and a final exam of 92, the homework score is 9 1, and if it is an arithmetic average, it is (84+92+91)/3 = 89;
After weighting, it is 84 * 30%+92 * 50%+91* 20% = 89.4 when the weight is known;
What if the weight is unknown? I want to know the chemical weighted average of two classes. There are 50 students in class one, with an average of 80, and 60 students in class two, with an average of 82. The arithmetic average is (80+82)/2=8 1, and the weighted average is (50 * 80+60 * 82)/(50+60) = 865438+. Full score 10, 8 for experts, 6 for teachers and 7 for students, but you think the weight of experts and teachers and students should be 0.5:0.3:0.2, so the weighted value is 8*0.5+6*0.3+7*0.2=7.2, and the arithmetic average is (8+6+7.
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Simply put, it is to calculate the average in proportion.
The so-called weighting is the weighted average. In stocks, it means weighted index. That is, a certain fund investment industry uses a specific weighted balance method to buy stocks of different enterprises. Doing so can diversify investment and reduce risks, and can also be used to represent the performance of an industry or stock market.