Statistics Basics: Mean, Median, Variance

📰 Dev.to · Akhilesh

Learn statistics basics to understand your data before training a model, focusing on mean, median, and variance

beginner Published 24 Apr 2026
Action Steps
  1. Calculate the mean of a dataset using the formula: sum of all values divided by the number of values
  2. Find the median of a dataset by sorting the values and selecting the middle value
  3. Compute the variance of a dataset using the formula: average of the squared differences from the mean
  4. Apply these statistics concepts to a sample dataset to understand the distribution of values
  5. Compare the mean and median to determine if the data is skewed
  6. Visualize the data using a histogram or box plot to better understand the distribution
Who Needs to Know This

Data scientists and analysts benefit from understanding statistics basics to make informed decisions about their data and models. This knowledge is essential for anyone working with data, including machine learning engineers and data engineers.

Key Insight

💡 Understanding mean, median, and variance is crucial for making informed decisions about your data and models

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📊 Understand your data with statistics basics: mean, median, and variance! 📈

Key Takeaways

Learn statistics basics to understand your data before training a model, focusing on mean, median, and variance

Full Article

Before you train a single model, you need to understand your data. Not a vague understanding. A...
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