About Lesson
Descriptive Statistics
Overview: This section focuses on methods for summarizing and describing data.
- Measures of Central Tendency:
- Mean: The average of a dataset.
- Median: The middle value when data is ordered.
- Mode: The most frequently occurring value.
- Measures of Variation:
- Range: The difference between the highest and lowest values.
- Variance: The average of the squared differences from the mean.
- Standard Deviation: A measure of the amount of variation or dispersion in a set of values.
- Real-Life Example:
- In a class of students, the mean score on a test can indicate overall performance, while the standard deviation can show how much individual scores vary from the average.
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