"Median and Mode" PPT courseware

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"Median and Mode" PPT courseware

1. Arrange n pieces of data in order from small to large (or from large to small). If n is an odd number, then the number at the _______ position is called the median of this set of data; if n is an even number, then the number in the middle position is the median of the set of data. The _______ of data is called the median of this set of data.

2. The data that appears _________ times in a set of data is called the mode.

1. (4 points) (2013·Zhanjiang) Wuchuan Jizhao, a provincial resort with a pleasant climate, measured the average temperatures from January to May to be 17, 17, 20, 22, 24 (unit: ℃), the median of this set of data The number is ()

A． 24B. 22C. 20D． 17

2. (4 points) (2013·Zhuzhou) Kong Ming’s shooting results during summer military training are as follows:

Then the median of Kong Ming’s shooting scores is ()

A． 6B． 7C. 8 D． 9

3. (4 points) (2013 Jilin) ​​During the Dragon Boat Festival, the maximum temperature (unit: ℃) of a city every day for a week is as shown in the figure, then the median of this set of maximum temperature data is ()

A． 22B. 24C. 25D. 27

15. (16 points) (2013·Anhui) In order to understand the skill level of workers in processing the same type of parts per unit time, a factory randomly selected the parts processed by 50 workers for testing, and calculated that the number of qualified products processed by each of them was 1-8 For these 8 integers, partial information of the statistical chart is now provided. Please answer the following questions:

(1) According to the statistical chart, find the median number of qualified products processed by these 50 workers;

(2) Write down the possible values ​​of the mode of the number of qualified products processed by these 50 workers;

(3) The factory determines that workers have qualified skills if they process no less than 3 pieces of qualified products per unit time. Otherwise, they will receive skills retraining. It is known that there are 400 similar workers in this factory. Please estimate the number of people who will receive skills retraining in this factory.

(1)∵ Arrange the number of qualified products from small to large. The 25th and 26th numbers are both 4.

∴The median is 4

(2) The mode may be 4, 5, 6

(3) Among these 50 workers, the number of people with less than 3 qualified products is 2 + 6 = 8 (people), so the number of people who will receive retraining in the factory is approximately 400 × 8/50 = 64 (people)

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"Median and Mode" PPT:

"Median and Mode" PPT Part One Content: Teaching Objectives 1. Understand and be able to find the median and mode of a set of data in actual situations. 2. According to specific problems, be able to select appropriate statistical tables to represent different characteristics of the data. 3. Feel statistics in life..

"Median and Mode" PPT Courseware 2:

"Median and Mode" PPT Courseware 2 The average, median and mode can all be used as representatives of a set of data. They each have their own characteristics and can provide information from different angles. The average is obtained through calculation, using the information of all the data, and is a practical question...

"Median and Mode" data analysis PPT courseware:

"Median and Mode" Data Analysis PPT Courseware Learning Objectives 1. Be able to find the median and mode of a set of data 2. Master the functions of median and mode 3. Be able to use median and mode Analyzing Practical Problems What is the median? 1. Median: Sort a set of data according to...

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Update Time: 2024-11-25

This template belongs to Mathematics courseware Hebei Education Edition Ninth Grade Mathematics Volume 1 industry PPT template

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