1.3 Experimental Design

Section 1.3 Experimental Design Part 1: Experimental Design & Data Collection Larson/Farber 4th ed.

Experimental Design ,[object Object],[object Object]

Designing a Statistical Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Collection ,[object Object],[object Object]

Data Collection ,[object Object],[object Object],[object Object]

Example: Methods of Data Collection ,[object Object],[object Object],Solution: Simulation (It is impractical to create this situation) Larson/Farber 4th ed.

Example: Methods of Data Collection ,[object Object],Solution: Experiment (Measure the effect of a treatment – eating oatmeal) Larson/Farber 4th ed.

Example: Methods of Data Collection ,[object Object],Solution: Observational study (observe and measure certain characteristics of part of a population) Larson/Farber 4th ed.

Example: Methods of Data Collection ,[object Object],Solution: Survey (Ask “Do you approve of the way the president is handling his job?”) Larson/Farber 4th ed.

Section 1.3 Experimental Design Part 2: Sampling Techniques Larson/Farber 4th ed.

Sampling Techniques ,[object Object],[object Object],[object Object],[object Object]

Random Samples ,[object Object],[object Object]

Simple Random Sample ,[object Object],[object Object],[object Object]

Example 1: Simple Random Sample ,[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Solution: Simple Random Sample ,[object Object],[object Object],The students assigned numbers 719, 662, 650, 4, 53, 589, 403, and 129 would make up the sample. Larson/Farber 4th ed.

Example 2: Simple Random Sample ,[object Object],[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Choosing Members of a Sample ,[object Object],[object Object],[object Object]

Other Sampling Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Other Sampling Techniques ,[object Object],[object Object]

Other Sampling Techniques ,[object Object],[object Object],Larson/Farber 4th ed.

Stratified Sampling Versus Cluster Sampling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Other Sampling Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Other Sampling Techniques ,[object Object],[object Object],[object Object],Larson/Farber 4th ed.

Example: Identifying Sampling Techniques ,[object Object],[object Object],Larson/Farber 4th ed.

Example: Identifying Sampling Techniques 1. You divide the student population with respect to majors and randomly select and question some students in each major. Solution: Stratified sampling (the students are divided into strata (majors) and a sample is selected from each major) Larson/Farber 4th ed.

Example: Identifying Sampling Techniques ,[object Object],Solution: Systematic sample (the sample was selected by numbering all members of the population, choosing a random starting number and selecting at regular intervals from the starting number) Larson/Farber 4th ed.

Example: Identifying Sampling Techniques ,[object Object],Solution: Cluster sample (each class is a naturally occurring subgroup and you question each student in the class) Larson/Farber 4th ed.

Example: Identifying Sampling Techniques ,[object Object],Solution: Convenience sample (the sample was selected by only using available students) Larson/Farber 4th ed.

1.3 Experimental Design

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1.3 Experimental Design