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Learning Statistics with Python

Calculating Confidence Interval with PythonCalculating Confidence Interval with Python

If we are working with a small distribution (size less than or equal to 30) that approximates the normal distribution, we will use t-statistics.

How to calculate the confidence interval?

  • We use the t.interval() function from scipy.stats for the Student's T distribution.
  • As mentioned earlier, alpha represents the confidence level.
  • df stands for the number of degrees of freedom.
  • loc represents the mean.
  • sem represents the standard error of the sample.

Degrees of Freedom

Degrees of freedom are the number of independent information elements used to estimate a parameter.

The formula for degrees of freedom is N - 1, where N is the sample size.

Feel free to adjust the alpha parameter and observe the resulting changes.

Everything was clear?

Section 5. Chapter 6