Sampling Variability and the Effect of Sample Size

The 19th installment in a 25-part series builds upon the sampling from the previous unit and takes a larger sample. Pupils compare the dot plots of sample means using two different sample sizes to find which one has the better variability.

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CCSS: Designed
Instructional Ideas

  • Use statistics software to calculate several sample groups of varying sizes to show that the larger the sample size, the smaller the sample variability
  • Lead a discussion about the balance of getting a large enough sample size and keeping the sample size manageable
Classroom Considerations

  • Individuals must be able to build and read a dot plot

  • Provides an axis to sketch dot plots
  • Includes an exit ticket to assess understanding of the major concepts

  • None
Common Core