Class 11 Economics - CBSE
Measures of Central Tendency
The chapter Measures of Central Tendency in Class 11 Economics introduces students to statistical tools used to summarize vast amounts of numerical data into a single representative value. You will learn about three major averages: Arithmetic Mean, Median, and Mode, calculated for individual, discrete, and continuous series. This chapter is vital for your CBSE board preparation because it forms the backbone of statistical analysis and data interpretation in economics. Questions from this chapter frequently appear as numerical problems or practical application-based short and long-answer questions, making accuracy in calculations essential for scoring high marks.
Start Learning FreeKey Concepts
Arithmetic Mean
The most popular and widely used average, calculated by dividing the sum of all observations by the total number of observations.
Median
The positional average that divides an arranged series into two equal parts, representing the exact middle value of a dataset.
Mode
The value that occurs most frequently in a dataset, representing the point of maximum concentration of data.
Partition Values
Statistical measures like Quartiles, Deciles, and Percentiles that divide a series into four, ten, and hundred equal parts respectively.
Statistical Series Types
Data is categorized into individual series, discrete frequency distributions, and continuous frequency distributions, each requiring different formulas for calculation.
Important Formulas
Board Exam Info
In the CBSE Class 11 Economics exam, this chapter typically carries around 6 to 8 marks. Questions usually include direct numerical calculations of mean, median, or mode from continuous frequency distributions, missing frequency problems, and theoretical questions comparing the merits and demerits of different averages.
Frequently Asked Questions
Which average is best to use when there are extreme values in the data?
Median is the best measure because it is not affected by extreme or unusually large values, unlike the Arithmetic Mean.
Can the value of Mode be calculated graphically?
Yes, Mode can be easily located graphically by drawing a histogram and constructing cross-lines at the highest rectangle.
What is the difference between direct method and assumed mean method for calculating Mean?
Both methods give the exact same answer, but the assumed mean method makes calculations much easier and faster when dealing with large numbers or complex frequency data.
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