Sampling from a group of people
Interest in specific numerical or categorical characteristics
Select Gender from the pop-up menu on the right to illustrate sampling this characteristics of this population of people. Similarly illustrate sampling the Weights of the people.
Mention that we usually abstract by considering sampling from populations of numbers or categories.
Variability of sample statistics
While displaying the Genders of the people, click Propn(Male) to see the proportion of males in the population and sample. Discuss the sample-to-sample variability in sample proportions and the difference between the sample and population proportions (sampling error).
While displaying their Weights, similarly discuss the variability of the sample mean and its sampling error.