PCS- More Planning and Sampling Techniques Lesson

PCS- More Planning and Sampling Techniques

The true power of sampling is the ability to generalize the findings to the associated population. A sample creates a statistic which is used to determine the reality for its corresponding population.

Samples have Statistics but Populations have Parameters!

The most valuable statistics are averages and proportions.   Recall, averages are used for numerical or quantitative data while proportions, or percents, are used for categorical data.   Typically we are interested in making a statement about a mean or a proportion as the parameter of interest of a population.   Occasionally there is interest in examining the spread or variation.  

The table restates and expands on the terms introduced in the previous lesson.   There are subtle differences between some of the strategies.   Identifying those strategies in context can be tricky but is an important skill to practice.

 

 Can you determine which sampling method should be used for the situations described?

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