Please enable JavaScript.

Coggle requires JavaScript to display documents.

CONFIDENCE INTERVAL ESTIMATION, OBJECTIVES - Coggle Diagram

- - - - If the population standard deviation σ is unknown, we can substitute it with the sample standard deviation, s
        This introduces extra uncertainty, since s is variable from sample to sample
        So we use the t distribution instead of the normal distribution
    - - Population is normally distributed (sample size is not important then)
      - If population is not normal but n30, use a large sample so that the Central Limit Theorem can be applied