• Population proportion, p: The proportion of the entire population that has the specified attribute.
    • The proportion of all MSU students who favor the new Double Chocolate Milano cookies.
    • Parameter or statistic?
  • Sample proportion, : The proportion of the sample that has the specified attribute.
    • The proportion of our class students (a “random sample” from the population) who favor the new Double Chocolate Milano cookies.
    • Parameter or statistic?