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Authoritative PPT Summary
"Understanding the Median" PPT
Part One: Teaching Objectives
1. Experience the process of reading statistical tables, sorting data, discussing, etc. to understand the "median".
2. Understand the meaning of "median" and be able to find the "median" in a set of data.
3. Understand the different meanings of the three statistics, and appreciate the widespread application of statistics in life and its role in decision-making.
review
1. What is average?
The average is the average of a set of data, which represents the average state of this set of data.
2. What is the mode?
The data that appears most frequently in a set of data is called the mode of the set of data.
Understanding the Median PPT, Part 2: Median
The n numbers are arranged in order of size, and the data in the middle (or the average of the two middle data) is called the median of this set of data.
Notice
1. When finding the median, this set of data must be arranged in order from large to small (or small to large);
2. When the given data is an odd number, the median is in the data; when the given data is an even number, the median is not in the given data, but the average of the two middle data;
3. The median of a set of data is unique.
What are the different meanings of the mean, mode, and median of this set of data?
The average is the average of this set of data, which represents the average state of this set of data, rather than representing an actual data; the mode is the number that appears most often in this set of data; the median is the order of this set of data Arrange a number in the middle.
Understanding the Median PPT, Part 3: Practice
1. A factory basketball team has 12 players. Their ages (unit: years) are as follows:
20 22 24 24 19 24 18 20 24 24 30 21
(1) What is the mode of this set of data?
(2) What is the median of this set of data?
(3) What is the average of this set of data?
2. The following is a statistical table of how Wang Xiaohong used her rest time to dress the technicians in the garment factory during the year.
(1) What information did you get from the above data?
(2) What is the median of this set of data?
(3) How many pieces of clothing does Wang Xiaohong process per month on average?
(4) The factory pays 4.5 yuan per piece of clothing. In which month did Wang Xiaohong earn the most? Which month has the least salary income?
(5) How much salary does Wang Xiaohong earn from processing clothing in a year?
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