| Category | Format | Size |
|---|---|---|
| Beijing Normal University eighth grade first volume mathematics | pptx | 6 MB |
"Average" Data Analysis PPT Courseware 4
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"Average" Data Analysis PPT Courseware 4
Knowledge review
1. The average of data 2, 3, 4, 1, and 2 is ________, and this average is called the ________ average.
2. The highest temperature statistics of a certain city in late July are as follows:
(1). Among these ten data, the weight of 34 is _____, and the weight of 32 is ______.
(2) The average maximum temperature in the city in mid-July is _____, and this average is the ________ average.
3. The average weight of the male students in Xiaoming’s class is 45kg, and the average weight of the male students in Xiaoliang’s class is 42kg. The following judgment is correct ( )
A. Xiao Ming’s weight is 45kg
B. Xiao Ming is 3kg heavier than Xiao Liang
C. Xiao Ming’s weight cannot be determined
D. Xiao Ming and Xiao Liang have the same weight
If the average of x1, x2...xn is a
(1) Then the average of the data x1+3, x2 +3…xn +3 is ________.
(2)Then the average of the data 10x1,10x2…10xn is ________.
Xiaoying's family's food expenses last year were 3,600 yuan, education expenses were 1,200 yuan, and other expenses were 7,200 yuan. The three expenditures of Xiaoying's family this year have increased by 9%, 30%, and 6% compared with last year. What is the percentage increase of Xiaoying's total expenditure this year compared with last year?
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For more information about the "Analysis of Data Average" PPT courseware, please click the "Analysis of Data ppt Average ppt" tab.
"Average and Weighted Average" PPT courseware 3:
"Average and Weighted Average" PPT courseware 3 (1) Observation and thinking Divide an experimental field into 8 equal areas, each 100m2, and try to plant two different varieties of wheat under the same conditions of soil fertility, fertilizer, management, etc. , the output is as follows: 1. From Figure 261..
"Average and Weighted Average" PPT Courseware 2:
"Average and Weighted Average" PPT Courseware 2 When calculating the weighted average based on the frequency distribution table, the ________ of each group is commonly used in statistics to represent the actual value of each group, and the ______ of each group is regarded as the value in the corresponding group The right of value. 1. (4 points) Among the following sets of data, in the group...
"Average and Weighted Average" PPT courseware:
"Average and Weighted Average" PPT courseware 1. Generally, we call the ratio of the sum of n numbers x1, x2, and xn to n the arithmetic mean of these n numbers. The abbreviated mean is recorded as x and pronounced as x. 2. The importance of each data in a set of data is not necessarily the same...
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Update Time: 2024-06-30
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