"Data Fluctuations" Data Collection and Processing PPT Courseware

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"Data Fluctuations" Data Collection and Processing PPT Courseware

Scenario 1. There are two boxes of apples of the same variety, A and B. Their total mass is the same, 5kg, and the number of apples in each box is also the same; but the apples in box A are very large and the small apples are very small, while the apples in box B are very small. The apples in the box are relatively uniform in size. Which box will you choose?

Scenario 2: One of the two high jumpers A and B is to be selected to participate in the municipal competition one month later. Currently, A and B each jump 5 times and the results are as follows (unit/cm)

A: 157 161 160 159 163

B: 155 170 160 155 160

Who do you think should be selected to participate?

Scenario 3. 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 75g chicken legs. There are currently two manufacturers providing supply, and their prices are the same. The quality 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:

(1) Can you estimate the average mass of chicken legs sampled from factories A and B from the picture?

(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.

(3) What is the maximum mass of the 20 chicken legs sampled from Factory A? What is the minimum value? How many grams are they different? What about Factory B?

(4) If you only consider the specifications of chicken legs, which manufacturer of chicken legs do you think a foreign trade company should buy?

In real life, in addition to caring about the "average level" of data, people often also pay attention to the degree of dispersion of data, that is, their deviation from the "average level". Range is a statistic that describes the degree of dispersion of data.

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

Discuss

A school wants to select one of two athletes A and B to participate in an inter-school competition. In the last 10 trials, their results (unit: cm) are as follows:

A: 585 596 610 598 612

597 604 600 613 601

B: 613 618 580 574 618

593 585 590 598 624

practice

There are two students in a class, A and B. Their five math test scores in a certain semester are as follows:

A: 76 84 80 87 73

B: 78 82 79 80 81

Which student’s math scores are stable?

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"Data Fluctuation" Data Collection and Processing PPT Courseware 3:

"Data Fluctuation" Data Collection and Processing PPT Courseware 3 Problem Situation In order to improve the international competitiveness of agricultural and sideline products, some industry associations have divided the planning of agricultural and sideline products. A foreign trade company wants to export a batch of 75g chicken legs. There are currently 2 manufacturers providing...

"Data Fluctuations" Data Collection and Processing PPT Courseware 2:

"Data Fluctuation" Data Collection and Processing PPT Courseware 2 Courseware Description This lesson is to understand the necessity and importance of analyzing the fluctuation degree of a set of data in a specific problem situation, by analyzing the scatter points of two sets of data with close averages Graphical representation, intuitively feel the data wave...

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Update Time: 2024-09-28

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

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