"50 Years of Change" Statistics and Probability PPT Courseware 2

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"50 Years of Change" Statistics and Probability PPT Courseware 2

Discuss

(1) In the distribution table of per capita net income of rural households in my country, in which range did the number of households have the largest number of households in 1985, 1990, 1995, and 1999? How did you figure it out?

(2) Please use a statistical chart to represent the per capita net income of rural households in my country in 1985. Which one do you choose?

(3) Please roughly estimate my country's rural per capita net income in 1985. How did you estimate it? Communicate with peers.

Think about it and do the math:

What calculation formula can you think of from the algorithm just now? Where have you used similar formulas?

The formula for calculating the weighted average, in which the percentage can be regarded as the weight of the per capita net income of each group.

Discuss

50×0.95%nk+150×11.20%nk+250×25.64%nk+350×24.10%nk+450×15.94%nk+550×9.13%nk+700×7.99%nk+900×2.85%nk+1250× 1.76%nk+1750×0.29%

+2250×0.15%nk=399.70nk(yuan)

Therefore, the per capita net income of rural residents in my country in 1985 was approximately 399.70nk÷nk=399.70 (yuan)

Do it:

The wavelet learning group investigated the family size of some residents in a certain city and drew the fan-shaped statistical chart below. Find the mode and average of the family population of this part of the population.

What gains and insights did you gain from this class...

Feel the rapid changes in the motherland

consolidated weighted average

Able to choose appropriate statistical charts to represent information

Improve the ability to read pictures and read information

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For more information about the PPT courseware "Statistics and Probability Changes in 50 Years", please click the "Statistics and Probability ppt Changes in 50 Years" ppt tag.

"50 Years of Change" Statistics and Probability PPT Courseware 3:

"50 Years of Change" Statistics and Probability PPT Courseware 3 Since the 1950s, my country's transportation situation has undergone tremendous changes. The following table reflects the changes in the length of transportation lines in our country over the past 50 years. (1) In railways, highways, inland waterway shipping, civil aviation...

"50 Years of Change" Statistics and Probability PPT Courseware:

"50 Years of Change" Statistics and Probability PPT Courseware Discuss: (1) Among the transportation modes of railways, highways, inland shipping, and civil aviation, which one has developed more rapidly in recent years? (2) Which mode of transportation has developed the slowest or even experienced negative effects for many years..

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Update Time: 2024-10-02

This template belongs to Mathematics courseware Beijing Normal University Ninth Grade Mathematics Volume 2 industry PPT template

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