how do you calculate the mean, median, and standard deviatio…

  • Mean: Add all values in the dataset, then divide by the number of values.
  • Median: Arrange the values in order, then find the middle value (or average the two middle values if even count).
  • Standard deviation:
    1. Find the mean
    2. Subtract the mean from each value (get deviations)
    3. Square each deviation
    4. Find the average of those squares (variance)
    5. Take the square root of the variance
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