Confidence intervals

Practicing Statistics Interview Questions in Python

Conor Dewey

Data Scientist, Squarespace

Intro to sampling

Intro to sampling

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Practicing Statistics Interview Questions in Python

What is a confidence interval?

Intro to confidence intervals

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Practicing Statistics Interview Questions in Python

Calculating confidence intervals

  Confidence interval means

Practicing Statistics Interview Questions in Python

Calculating confidence intervals

  Confidence interval proportions

Practicing Statistics Interview Questions in Python

Example: means

import scipy.stats as st
a = range(10,14)
st.t.interval(0.95, len(a) - 1, loc = np.mean(a), 
              scale = st.sem(a))

(9.446, 13.554)
Practicing Statistics Interview Questions in Python

Example: proportions

from sm.stats.proportion import proportion_conf
proportion_confint(4, 10, .05)

(0.0964, 0.7036)
Practicing Statistics Interview Questions in Python

Summary

  • Sampling
  • Confidence intervals
  • Example
Practicing Statistics Interview Questions in Python

Let's prepare for the interview!

Practicing Statistics Interview Questions in Python

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