Course Content
Learning Statistics with Python
Calculating Confidence Interval with Python
If we work with small distribution (the size is less or equal to 30) and the distribution approximates the normal, we will use t-statistics.
How to calculate confidence interval?
- From
scipy.stats
we use thet.interval()
function for the Student's T distribution. - As it was before,
alpha
means the confidence level. df
is the number of degrees of freedom.loc
is the mean.sem
is the standard error of the sample.
Degrees of freedom
The degree of freedom is the number of independent information elements that go into estimating a parameter.
The formula is N - 1
, where N
is the sample size.
Try to change the alpha
parameter and observe the changes.
Section 5.
Chapter 6