"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 4

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"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 4

New course introduction

Under the same conditions, in a large number of repeated experiments, if the frequency of a random event A is stable around a certain constant p, then this constant is called the probability of event A.

Questions (choose one of two questions):

1. When a shooter shoots once, the probability of hitting the target is _______.

2. When a die is thrown, the probability that the number on the upward side is 6 is _______.

Equally possible events. Various outcomes are equally likely to occur. The results of the experiment are limited.

Do it

1. There are 1,000 carp, crucian carp, and silver carp in a pond. A fisherman found through multiple capture experiments that the frequency of carp and crucian carp appearing is 31% and 42%, then there are carp in this pond ______ _tail, silver carp_______ tail.

2. A factory planned to produce a pencil case for middle school students, but could not determine the output of each color. So the stationery factory randomly surveyed 5,000 middle school students on the color of the pencil case, and found 1,000, 2,000, and 3,000. The frequency of each color was calculated when the number was 1, 4000, and 5000, and the line chart was drawn as follows:

Class exercises

1. According to the rules of the level-breaking game, please explore the secrets of the "level-breaking game":

(1) Use enumeration to express possible breakthrough situations;

(2) Find the probability of success in breaking through the level.

1. In a small town with 100,000 people, 2,000 people were randomly surveyed, and 250 of them watched the morning news on CCTV. Ask a random person in the town, what is the approximate probability that he watches the morning news? Approximately how many people in town watch CCTV's morning news?

Solution: According to the meaning of probability, it can be considered that the probability is approximately equal to 250/2000=0.125.

Approximately 100,000×0.125=12,500 people in this town watch the morning news on CCTV.

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For more information about the PPT courseware "Probability Preliminary Utilization of Frequency to Estimate Probability", please click the Preliminary Probability ppt Utilization of Frequency to Estimate Probability ppt tag.

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 5:

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 5 Review 1. Definition of probability, classification of events 2. Probability formula of equally likely events: P(A)=m/n 3. Conditions for finding the probability of equally likely events: (1) There are a finite number of all possible outcomes; (2) The possibility of each outcome..

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 3:

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 3 Review Review Census A comprehensive survey of the objects to be inspected for a certain purpose is called a census; the total number of objects to be inspected is called a population. Each object that makes up the population is called an individual. ..

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 2:

"Using Frequency to Estimate Probability" Probability Preliminary PPT Courseware 2 Review the past and learn something new. Use frequency to estimate probability. When there are many possible results of the experiment and the probability of each outcome occurring is equal, we can use the method to obtain the probability. When all possibilities of the experiment The result is not...

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Update Time: 2024-11-22

This template belongs to Mathematics courseware People's Education Press Ninth Grade Mathematics Volume 1 industry PPT template

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