"Stability of Frequency" Frequency and Probability PPT Courseware 3

Description

"Stability of Frequency" Frequency and Probability PPT Courseware 3

learning target

1. Understand the probability of inevitable and impossible events, and understand that the value of probability is between 0 and 1.

2. Experience the activity process of "guessing - testing and collecting test data - analyzing test results", understand the characteristics of uncertain phenomena, and develop the concept of randomness.

3. In the process of experiencing activities, cultivate students' awareness of cooperation and communication and the spirit of courage to explore.

Review the past and learn the new

1. Under certain conditions, there are some things that we can be sure of happening in advance. These things are called _________;

2. There are some things that we can be sure of in advance and will definitely not happen. These things are called _________;

3. There are some things that we cannot be sure in advance whether they will happen or not. These things are called _________, also called _________.

The frequency of occurrence of event A is used to express the possibility of occurrence of event A. We call this numerical value that describes the possibility of occurrence of event A called the probability of occurrence of event A, denoted as P(A).

Events are generally represented by uppercase English letters A, B, C, D...

Group discussion: the value range of p

Because in n trials, the frequency m of event A satisfies 0 ≤ m ≤ n, so 0 ≤ m/n ≤ 1, and it can be seen that the constant p to which the frequency m/n is stabilized satisfies 0 ≤ m/n ≤ 1, Therefore 0≤P(A)≤1.

Do it

Determine which of the following events are inevitable, impossible or uncertain events:

1. Turn on the TV and an advertisement is playing. Uncertain event

2. The earth always revolves around the sun. An inevitable event

3. The sun will rise from the west tomorrow. An impossible event

4. Roll two dice, two 6's face up. Uncertain event

5. If two numbers with different signs are multiplied together, the product is a positive number. Impossible event

As shown in the picture, there are two turntables that can rotate freely. Each turntable is divided into 6 equal sectors. Use these two turntables to play the following games:

(1) A freely rotates turntable A, while B freely rotates turntable B.

(2) After the turntable stops, move the pointer a few squares clockwise to get a number. (For example: if the pointer points to 3 on turntable A, move 3 squares clockwise to get the number 6)

(3) If the final number is an even number, you will get 1 point, otherwise you will get no points.

(4) Spin the wheel 10 times and record the result of each score. The person with the highest cumulative score is the winner.

Practice in class

1. The probability of an event occurring is as follows:

⑴Very likely, but not guaranteed to happen. ( )

⑵The possibility of happening is the same as that of not happening. ( )

⑶The possibility of occurrence is extremely small. ( )

⑷It can’t happen. ( )

Try to relate them to the following values:

A.0.1% B.50% C.0 D.99.99%

2. (Zhanjiang High School Entrance Examination) The events described in the following idioms will inevitably happen ( )

A. Catching the moon in the water B. Catching the turtle in the urn

C. Sit back and wait D. Destroy the seedlings and encourage them to grow

[Analysis] Choose B. According to the definition of inevitable events, we know that B should be chosen.

Class summary

Through the study of this class, we need to master:

1. Understand the relationship between frequency and probability.

2. Know the probability of an uncertain event happening by doing experiments.

3. Clarify the probabilities of the three events.

Keywords: Frequency and Probability Teaching Courseware, Stability of Frequency Teaching Courseware, Beijing Normal University Edition 7th Grade Mathematics Volume 2 PPT Courseware, 7th Grade Mathematics Slide Courseware Download, Frequency and Probability PPT Courseware Download, Stability of Frequency PPT Courseware Download ,.ppt format

For more information about the PPT courseware "Frequency and Probability Stability of Frequency", please click the Frequency and Probability ppt Stability of Frequency ppt tag.

"Stability of Frequency" Frequency and Probability PPT Courseware 4:

"Stability of Frequency" Frequency and Probability PPT Courseware 4 Review and Thoughts 1. Give an example of what an inevitable event is. 2. Give an example of what an impossible event is. 3. Give an example of what an uncertain event is. Introduction to the problem Toss a uniform coin. The coin...

"Stability of Frequency" Frequency and Probability PPT Courseware 2:

"Stability of Frequency" Frequency and Probability PPT Courseware 2 Learning Objectives 1. Experience the process of experiments, statistics and other activities, and further develop the awareness and ability of cooperation and communication in the activities; 2. Understand that when the number of experiments is large, the test frequency is stable compared to the theory Probability, and based on this...

"Stability of Frequency" Frequency and Probability PPT courseware:

"Stability of Frequency" Frequency and Probability PPT Courseware Frequency: In n repeated tests, uncertain event A occurs m times, then the ratio m/n is called the frequency of the event. The introduction of the problem: Toss a uniform coin. After the coin falls, two situations will occur: ..

File Info

Update Time: 2024-10-18

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

Preview