Statistical Problem Solving

  • sampling frame - a representation of the item available

  • sampling fraction = sample size/population size, 100% sample is called a census

  • sampling error - when an estimate of a parameter derived from sample data differs from its true value

  • Why taking a sample?

    • to help to understand a situation better

    • as part of a pilot study to inform the design of a larger investigation

    • to conduct a hypothesis testing