Confidence Intervals by Hand: 90% CI for a Population Mean (Sigma Unknown) - Part 1

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This short video details how to construct a 90% confidence interval for a population mean when the population standard deviation has not been given (Sigma is Unknown). In particular, the confidence interval is an interval that relies upon a t-Distribution t-score.
  1. Maths and Stats
  2. Confidence Intervals
  3. Confidence Intervals by Hand
  4. 90% Confidence Interval
  5. 90% CI
  6. Confidence Interval Population Standard Deviation is Unknown
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