How to average, how to average

How do you calculate the average?

There are two commonly used methods to calculate the average: one is the simple average method and the other is the weighted average method. There are also methods such as geometric mean, square mean (root mean square mean, rms), harmonic mean, etc.

The methods of averaging are:

1. Seek the law directly. The average is found using a formula, which is a method that arose from the idea of "equalization".

2. Finding the cardinal cardinality. Use formulas to find averages. This is the method of selecting the smallest of the numbers as the base number, which is derived from the idea of "making up the difference".

Mean, the most commonly used statistic in statistics, is the number of times that represents trends in a set of data, and is the sum of all the data in a set of data divided by the number of pieces of data in that group. It is a metric that reflects trends in a data set. There are direct methods for finding averages, cardinal numbers, etc.

The key to solving the problem of the average number is to find the "total score" corresponding to the "total quantity".

1. Seek the law directly.

The average is found using a formula, which is a method that arose from the idea of "equalization".

Formula: Total Quantity Total Number of Copies Average.

For example, Master Li processed an average of 30 parts per day in the first 4 days, and after improving the technology, he processed 55 parts on the fifth day, how many parts did Master Li process per day on average in 5 days?

Answer: First calculate the total number of parts in 5 days: 30 4 + 55 = 175 (pieces), and then find the average number of parts added per day in 5 days.

35 (pcs).2. Finding the cardinal cardinality.

Use formulas to find averages. This is the method of selecting the smallest of the numbers as the base number, which is derived from the idea of "making up the difference".

Formula: Cardinal Number Difference Between Each Number and Cardinal Number Total Copies Average.

For example, Master Wang processes an average of 26 parts in 4 days, and the number of parts processed on the 5th day is more than the average of 5 days. How many parts does Master Wang process on day 5?

Answer: Set Master Wang to process on the 5th day, x parts, and the "quantity" can be listed by the 5-day average.

x－5x－24=104+x

4x=128

x=32 (pcs).

Average application

Averages are widely used to describe or compare the effects of various technical measures, indicators of certain quantitative traits in livestock and poultry, and so on.

The average is the amount of the trend in a set of data, which is the sum of all the data in a set of data divided by the number of data in the group, and it is a metric that reflects the trend in the data set.

Is the moisture also wrong.

There is a mistake in your question, one cart of grain is 35 tons, two carts are 70 tons, and the third cart should be 105 tons, so 35 tons is a moisture.

Because I don't know the specific number, I assume that the first number is A, the second number is B, and so on, there are ABCDE these numbers, let's find the average, there are five numbers above, we only need to add up the above five numbers, divide by five [why divide by five, because there are five numbers on it]. i.e. (a+b+c+d+e) 5 [division in parentheses]. For example, find the average of 1,5,3,6 (totalnumber), we add up 1536 and divide itThat's it.

Add them all up and divide by the total to get the average.

, add them all, and divide by the number.

The mean is {the reading on the left side of the disk (the right degree of the disk is 180°)}2, for example, the average value of the first measurement b {76°53 16 (256°53 14 -180°)}2, but the average value of a.

The first row is 00°00 02, the last point a of the first roundup is 00°00 09, and then the last result is (00°00 02 00°00 09 ) 2, which is the average value of a, and the zero value is the average value of a, b, c d, minus (00°00 02 00°00 09) 2

The round-up method is suitable for observing a single angle with only two directions.

This method is observed in two positions: the left and right sides of the disk. When observing, the eyepiece is facing the observer, and if the vertical disk is on the left side of the telescope, it is called the left side of the disk; If it is located on the right side, it is called the right side of the plate. Usually, the angle is measured in the left position of the disk, which is called the upper half of the round.

Two half-test rounds together are called a one-test round. Sometimes the horizontal angle needs to be measured by the number of observations.