Lesson 4: Sampling Distribution

• reflects the variability that we would expect to find in the values of that statistic (differences between means) over repeated trials.

  the standard error of the distribution
• This refers to the hypothesis that the difference between the two population means is zero, or null (some people call this the “nil null”)

  The null hypothesis
• Rejecting Ho when in fact it is true.

  type I error
• Failing to reject Ho when it is in fact false and H1 is true

  type II error