"Experiencing the Misleading Data" PPT

Description

"Experiencing the Misleading Data" PPT

Part One: Teaching Objectives

1. Combined with specific examples, experience the process of data analysis and problem discussion to understand the process of misleading data.

2. Be able to use statistics to analyze problems, initially understand that data may be misleading, and be able to choose appropriate statistics to represent the characteristics of data.

3. Experience the scientific nature of using data to explain problems, and realize that many practical problems can be solved with the help of mathematical ideas and methods.

Understanding the misleading caused by data PPT, part 2: analysis of example questions

The company is recruiting staff.

The following is the salary statistics of the current personnel of this company.

Analyzing the statistical table, what do you think of the salaries of employees in this company?

What are the mean and mode?

Average: 2300

Mode: 1800

Let’s talk about it:

What do you think of this company's job advertisement?

According to relevant regulations, junior high school students should not have more than 90 minutes of homework per day. A middle school investigated the time it took 30 students to complete homework a day. The results are as follows:

(1) What is the mode of homework time? What is the median?

The mode is 2. Because the most people take 2 hours to complete the homework, the mode is 2; the median is 2.

(2) How much time does each student spend on average?

(12+15×2+3×3)÷30

=1.7(hour)

(3) Do you think the amount of homework in this article is appropriate? Why?

Understanding the misleading caused by data PPT, part three: discussion

Discuss: Little Naughty reports results

In a certain math test, the little naughty boy got 78 points. There were 30 people in the class. The scores of other students were 1 100 points, 4 90 points, 22 80 points, one 2 points and one 10 points. The average score of the whole class was 77, so he told his mother that his score was "above average." Did the little naughty kid cheat on his mother?

Experience the misleading caused by data PPT, Part 4: Practice questions

1. What numbers are generally used in the following situations?

(1). To indicate the students’ favorite cartoon, you should select ( )

A mean B median C mode

(2). There are 50 students in Class 5 (1) and 45 students in Class 5 (2). To compare the average scores of the two classes, ( ) should be selected.

A mean B median C mode

(3). In the speech contest, if a contestant wants to know what level he is at, he should choose ().

A mean B median C mode

Class summary

Talk about what you gained from this class?

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for the second volume of sixth grade, experience the misleading caused by data PPT download, .PPT format;

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Hebei Education Edition Sixth Grade Mathematics Volume 2 industry PPT template

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