The specific gravity is a very important knowledge point in the analysis of line measurement data, and judging the change of the proportion is the focus of the examination. Today, I will lead you to sort out the knowledge points and question types for judging the change in weight:
Knowledge points: the basis for judging the change of specific gravity.
Partial value growth rate The overall value growth rate, the proportion of the current period increases compared with the proportion of the base period;
Partial value growth rate The overall value growth rate, the proportion of the current period decreased compared with the proportion of the base period;
Partial Value Growth Rate The overall value growth rate, the current period is equal to the base period.
Method 1: Know the growth rate of the part and the whole and judge the change in the proportion.
Example 1] In November 2019, the profit of the consumer goods manufacturing industry increased by 8% year-on-year2%, the growth rate is 3 percent faster than in October1 percentage point. Among them, the profit of the food manufacturing industry increased by 325%, down 109%;Profits in the paper and paper products industry increased by 661%, the growth rate is 54% faster than in October3 percentage points; Textile profits fell by 114%, the decline narrowed by 205 percentage points.
Question: In November 2019, what was the proportion of the profit of the food manufacturing industry in the profit of the consumer goods manufacturing industry compared with the previous year?
a.Rise bDecline cEqual dNot sure.
Analysis] a. In November 2019, the profit of the consumer goods manufacturing industry increased by 8% year-on-year2%, and the profit of the food manufacturing industry increased by 325%。Part of the growth rate (32.)5%) is greater than the overall growth rate (8.).2%), the proportion increased year-on-year. Therefore, a is selected for this question.
Test method 2: The change of the proportion of the part in the whole is known, and the relationship between the growth rate of the part and the overall growth rate is inferred.
Example 2] In October 2019, the total retail sales of consumer goods increased by 7% year-on-year2%, the growth rate fell 0 from the previous month6 percentage points. From January to October, the online retail sales of physical goods in the country still maintained a rapid growth trend, and the online retail sales of physical goods accounted for 19 percent of the total retail sales of consumer goods5%, an increase of 2 year-on-year0 percentage points.
Question: From January to October 2019, how did the year-on-year growth rate of online retail sales of physical goods compare with the total retail sales of consumer goods?
a.Big BSmall cEqual dNot sure.
Analysis] a. According to the data, the proportion of online retail sales of physical goods in the total retail sales of consumer goods increased by 2 year-on-year0 percentage points, that is, the proportion of the current period is higher than that of the base period, so the growth rate of the available part of the value (national online retail sales of physical goods) is greater than the growth rate of the overall value (total retail sales of consumer goods). Select item A.
Judging the change of proportion: This test can examine both "judging the change of proportion according to the relationship between the growth rate" and "judging the relationship between the size of the growth rate according to the change of the weight". Therefore, it is necessary for everyone to understand different test methods through the practice of a large number of questions, so as to be well-informed and not panic.