"Frequency and Frequency" Data Collection and Processing PPT Courseware

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"Frequency and Frequency" Data Collection and Processing PPT Courseware

Question 1

Teacher Feng’s sister opened a shoe store on Taobao. Yesterday, she counted the sizes of 10 pairs of leather shoes sold that day:

42 40 41 40 38 40 40 41 40 39

Question 2

Yesterday, Teacher Feng participated in the school's speech contest. A total of 17 people participated, and the top eight entered the finals. Teacher Feng found out that the average score of the contestants in this competition was 92.5 points, the median score was 91 points, and Teacher Feng's score was 92 points. Did Mr. Feng enter the finals?

Make a note:

The difference between the maximum value and the minimum value of a set of data is called the range. (With units)

The number of data falling into each group after grouping is called frequency (without unit)

This statistical table that reflects the distribution of data is called a frequency distribution table (also called a frequency table)

The number of groups in a set of data = the integer part of the quotient of the range/group distance + 1

Do it

(1) Known data: 25, 21, 23, 25, 27, 29, 25, 28, 29, 30, 26, 24, 25, 27, 26, 22, 24, 25, 26, 28. This set of data The range is _____. If the group interval is 2, it should be divided into ___ groups.

(2) In the frequency distribution table that organizes 80 data, the sum of the frequencies of each group is equal to _____.

(3) Xiao Ming flips a coin 30 times and gets tails 10 times. Then the frequency of heads is _____.

Homework:

1. Investigate the activities of our classmates last weekend and express the obtained data in a frequency distribution table. (Sports, watching TV, reading homework, going out, etc.)

2. According to the frequency distribution table, share your opinion on how to spend a meaningful weekend.

3. Complete the homework book.

4. Preview 3.1(2) Frequency

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For more information about the "Collection and Processing of Frequency and Frequency Data" PPT courseware, please click the "Collection and Processing of Frequency and Frequency ppt Data" ppt tab.

"Frequency and Frequency" PPT courseware:

"Frequency and Frequency" PPT courseware Learning objectives (1) Be able to find the frequency and frequency of an event (2) Be able to list frequency and frequency distribution tables. Problem situation Do you like watching basketball games? Who is your favorite basketball star? (A represents Yao Ming, B represents Yi Jian...

"Frequency and Frequency" Data Collection and Processing PPT Courseware 4:

"Frequency and Frequency" Data Collection and Processing PPT Courseware 4 Review and think about what should be paid attention to when sampling surveys? (1) The size of the sample (2) The representativeness of the sample (3) The breadth of the sample What is your favorite sport? ? Who is your favorite sports star? you..

"Frequency and Frequency" Data Collection and Processing PPT Courseware 3:

"Frequency and Frequency" Data Collection and Processing PPT Courseware 3 Let's talk about it. First answer the following questions, and then fill in the table below: (1) In these 10 trials, what is the frequency of tails? What is the relationship between the frequency of heads and the frequency of tails? ..

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Beijing Normal University eighth grade mathematics volume 2 industry PPT template

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