• R
    • pnorm, qnorm, rnorm, dnorm
    • pt, qt, rt, dt
    • pf, qf, rf, df 나중에
  • variance (var())
    • SS / df
  • standard deviation (sd{})
    • sqrt(SS/df)
    • 68, 95, 99 %
  • sampling distribution 아래와 거의 같은 내용
  • hypothesis testing
  • t-test summary