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Authoritative PPT Summary
"Analyzing the Central Trend of Data from Statistical Charts" Data Analysis PPT Courseware 2
teaching objectives:
1. Experience the activities of analyzing data concentration trends from statistical charts, build data intuition, and develop geometric intuition.
2. Able to obtain information from statistical charts such as bar charts and fan charts, and find or estimate the average, median, and mode of relevant data.
In a certain shooting competition, team A’s results are as shown on the right:
When describing the central tendency of data with the help of statistical charts, it is necessary to develop a good habit of making intuitive estimates first and then verifying them with precise calculations.
(1) According to the statistical chart, determine the mode of the 10 shooting results is ( ) and the median is ( ).
(2) First estimate the average of these 10 shooting results, and then do the calculations to see how good your estimate is.
In a line chart, how can you find the mode, median, and mean of a set of data?
Mode: ____________________________;
median:___________________________;
Average:___________________________.
In order to check whether the quality of the bread meets the standard, 10 breads of the same size are randomly selected. The quality of these 10 breads is as shown in the figure.
(1) The mode of the quality of these 10 breads is ( ) and the median is ( );
(2) Estimate the average quality of these 10 loaves of bread, and then calculate it specifically to see how good your estimate is.
Gain insights
What did you gain from studying this lesson? Please talk about how to obtain information from statistical charts such as bar charts and fan charts, and find or estimate the average, median, and mode of relevant data.
(1) In the line chart,
Mode: the data that appears most frequently on the same horizontal line;
Median: Find the number corresponding to the middle point from top to bottom (or bottom to top);
Mean: The mean can be estimated using the median and mode.
(2) In the bar chart,
Mode: It is the data with the highest column;
Median: Find the middle number from left to right (or right to left);
Mean: The mean can be estimated using the median and mode.
(3) In the fan chart,
Mode: the data with the largest sector area;
Median: In order, look at the corresponding percentages, the average of the 50% and 51% data;
Average: Can be calculated using weighted average.
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"Analyzing the Central Trend of Data from Statistical Charts" Data Analysis PPT Courseware:
"Analyzing the Central Trend of Data from Statistical Charts" Data Analysis PPT Courseware Learning Objectives 1. Master the characteristics of line statistical charts, bar statistical charts, and sector statistical charts 2. Be able to obtain information from statistical charts and find or estimate relevant data The mean, median and mode of ..