"The Dispersion Degree of Data" Data Analysis PPT Courseware

Description

"The Dispersion Degree of Data" Data Analysis PPT Courseware

In order to improve the international competitiveness of agricultural and sideline products, some industry associations have divided the specifications of agricultural and sideline products. A foreign trade company wants to export a batch of chicken legs with a specification of 75g. There are currently 2 manufacturers providing supply. Their prices are the same and the quality of the chicken legs is also similar. The quality inspector sampled 20 chicken legs from the products of factories A and B respectively. Their mass (unit: g) is as follows:

Factory A: 75 74 74 76 73 76 75 77 77 74

74 75 75 76 73 76 73 78 77 72

Factory B: 75 78 72 77 74 75 73 79 72 75

80 71 76 77 73 78 71 76 73 75

Represent these data as the following figure:

(1) From the figure, can you estimate the average mass of chicken legs extracted from factories A and B?

(2) Find the average mass of chicken legs sampled from factories A and B, and draw a straight line representing the average mass on the graph.

Range refers to the difference between the largest data and the smallest data in a set of data.

It is a statistic that describes the degree of dispersion of data.

If Factory C also participates in the competition and samples 20 chicken legs from this factory, their quality data is as follows:

(1) What are the average and range of the quality of these 20 chicken legs in Factory C?

(2) How to describe the difference between the quality of the 20 chicken legs in Factory C and its average number? Calculate the difference between the quality of 20 chicken legs from factories A and C and their corresponding averages.

(3) Among the two factories A and C, which factory do you think the quality of chicken legs meets the requirements better? Why?

Calculator use

Explore using a calculator to find the standard deviation of the following set of data:

98 99 101 102 100 96 104 99 101 100 Please use the calculator to explore the specific steps to find the standard deviation of a set of data.

Steps to use a calculator to find the standard deviation of the following set of data (taking CZ1206 as an example):

1. Enter the statistical calculation state and press 2ndf STAT;

2. Enter data and then press DATA. The displayed result is the cumulative number of input data.

3. Press σ to get the result directly.

Keywords: data analysis courseware, data discrete degree courseware, Beijing Normal University edition eighth grade mathematics volume PPT courseware, eighth grade mathematics slide courseware download, data analysis PPT courseware download, data discrete degree PPT courseware download, .ppt Format

For more information about the "Analysis of Data Dispersion Degree" PPT courseware, please click the "Data Dispersion Degree ppt Data Analysis ppt" tag.

"The Dispersion Degree of Data" PPT courseware:

"Dispersion Degree of Data" PPT courseware review the past and learn the new 1. Average number x=1/n(x1+x2+x3++xn) 2. Mode In a set of data, the data that appears most frequently is called the mode of this set of data. . 3. The median arranges a set of data from small to large, and the middle number...

"The Dispersion Degree of Data" Data Analysis PPT Courseware 3:

"Dispersion of Data" Data Analysis PPT Courseware 3 Learning Objectives 1. Understand the concepts of range, variance and standard deviation, the three measures that describe the degree of data dispersion. 2. Be able to use a calculator to find the values ​​of range, variance and standard deviation. values ​​and apply them to specific problems. ..

"The Dispersion Degree of Data" Data Analysis PPT Courseware 2:

"Dispersion Degree of Data" Data Analysis PPT Courseware 2 Review the past and learn the new What are range, variance and standard deviation? What is the formula for calculating variance? What is the relationship between the variance of a set of data and the fluctuation of this set of data? Range refers to the difference between the largest data in a set of data and...

File Info

Update Time: 2024-10-01

This template belongs to Mathematics courseware Beijing Normal University eighth grade first volume mathematics industry PPT template

Preview