"Census and Sampling Survey" PPT Courseware 3

Description

"Census and Sampling Survey" PPT Courseware 3

learning target

1. Understand the significance of census and sample survey, and be able to distinguish between census and sample survey in specific situations.

2. Be able to describe the characteristics of census and sampling surveys, and understand the necessity of sampling.

3. Understand the meaning of population, individual, sample and sample size, and be able to point them out in actual situations.

Self-learning

1. The ________ conducted on ____ inspection objects for the purpose of _____ is called a census. The totality of objects under investigation is called ________, and each object under investigation that makes up the whole is called _______.

2. People extract some _____ from _____, and based on the investigation of this part of individuals, _____ the ________ of the object being inspected. This kind of investigation is called __________. A part of the individuals selected from the population constitutes a ________ of the population. The number of individuals in the sample is called __________.

Task 2, sampling survey, population, individual and sample, sample size

Example 2. In order to understand the weight of eighth grade students, the weight of 20 students was randomly checked. In this question, what are the population, individual, sample, and sample size?

[Inspection object]refers to the data of a certain characteristic of a thing, rather than the thing itself

Overall: Weight of all eighth grade students

Individual: The weight of each eighth grade student

Sample: The weight of these 20 students

Sample size: 20

I am the best in this section

1. (2013 Shandong Zibo 3 points) To investigate the following questions, the suitable one for census is [ ]

(A) The results of a certain class of students in the "standing long jump" (B) The types of fish in a certain reservoir

(C) The number of times the soles produced by a shoe factory withstand bending (D) The service life of a certain model of energy-saving lamps

2. (2012 Shandong 3 points) Which of the following questions is not suitable for the census [ ]

A． Understand the weekly physical exercise time of the whole class. B Investigate whether the passengers on the plane carry hazardous items.

C. The school recruits teachers and interviews the candidates D. Survey the city’s citizens’ awareness of the London Olympic mascots

3. In 2013, 15,000 students in a certain district took the high school entrance examination. In order to examine their mathematics examination performance, the examiners selected the mathematics scores of 800 candidates for statistics. Which of the following statements is correct ()

(A) Each examinee is an individual (B) Each examinee’s mathematics score is an individual

(C) These 15,000 candidates are the population. (D) The mathematics scores of these 15,000 candidates are the population.

(E) 800 candidates are a sample of the population

(F) The mathematics scores of 800 candidates are a sample of the population. (G) This is a census

(H) This is a sample survey (I) The sample size is 800 people

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"Census and Sampling Survey" PPT Courseware 2:

"Census and Sample Survey" PPT Courseware 2 Objective Tips Learning objectives: 1. Understand and be able to distinguish between census and sample survey in specific situations; 2. Be able to describe the characteristics of census and sample survey, and understand the necessity of sampling; 3. Understand Population, individual, sample and sample..

"Census and Sample Survey" PPT courseware:

"Census and Sample Survey" PPT Courseware Communication and Discovery In social production and real life, in order to make scientific and reasonable judgments and decisions on certain issues, it is usually necessary to first collect some relevant data through surveys, and then conduct analysis and research. In our country from 1984 to 19..

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Update Time: 2024-11-19

This template belongs to Mathematics courseware Qingdao Edition Seventh Grade Mathematics Volume 1 industry PPT template

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