"Frequency and Frequency" PPT courseware

Description

"Frequency and Frequency" PPT courseware

learning target

(1) Able to find out the frequency and frequency of occurrence of an event

(2) Frequency and frequency distribution tables will be listed

problem situation

Do you like watching basketball games? Who is your favorite basketball star? (A represents Yao Ming, B represents Yi Jianlian, C represents Kobe Bryant, and D represents Jordan).

Xiao Ming surveyed 50 students in a certain class about their favorite basketball stars. The results are as follows: (A represents Yao Ming, B represents Yi Jianlian, C represents Kobe Bryant, and D represents Jordan).

Based on this result, can you quickly name the favorite basketball star of the class?

Do you think Xiao Ming’s data presentation method is good? Can you devise a better representation?

Do it

1. A survey was conducted on the ages of 50 students in Class 8 (1) of a school. Among them, there were 2 15-year-olds, 45 14-year-olds, and 3 13-year-olds. Then the frequency of 14-year-olds is _____, frequency for____.

2. There are 40 numbers in a set of data, and the frequency of 23 is 0.3. Then among these 40 numbers, the frequency of 23 is ____.

3. Divide the 50 data into six groups, one of which has a frequency of 14.

There are two groups with a frequency of 10 and two groups with a frequency of 0.14. Then the frequency of the other group is ____ and the frequency is ____.

4. In the statistics of a test score of a certain class, the number of people in each score range is as shown in the figure (the score is a positive integer, with a full score of 100 points).

(1) How many students are there in the class?

(2) What is the frequency of the group 69.5 to 79.5 points? What is the frequency?

talk about

1. What are frequency and frequency?

2. How to calculate frequency and frequency?

3. Frequency, what is the relationship between frequency and total amount of data?

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"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? ..

"Frequency and Frequency" Data Collection and Processing PPT Courseware 2:

"Frequency and Frequency" Data Collection and Processing PPT Courseware 2 The problem of two melon farmers, Lao Zhang and Lao Wang, planted watermelons on an acre of land. In order to compete with melon planting technology: Lao Zhang randomly weighed the weight of 10 watermelons (kg ) are: 2 8 10 4 6 6 4 2 8 10 old..

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Update Time: 2024-09-30

This template belongs to Mathematics courseware Qingdao Edition Ninth Grade Mathematics Volume 2 industry PPT template

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