DS StatisticsLesson 12Free preview
Stat Introduction
This lesson is part of Data Science · All levels
Summary
Descriptive statistics summarize the main characteristics of a data set through central trend measurements such as mean, median, and mode. The median is the mean of the data ordered and often represents the data center more when there is an outlier. Understanding these measurements is the foundation before we go into inferential analysis.
Key points
- Mean = the sum of all values divided by the number of data.
- Median is the mean after the data is sorted.
- Mode = most frequently occurring value.
- The median is more resistant to outliers than the mean.
- Descriptive statistics are the first step after data clearance.
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