Содержание
- 2. Experimental Design The goal of every statistical study is to collect data and then use the
- 3. Guidelines Designing a statistical study 1. Identify the variables of interest, the focus, and the population
- 4. Data Collection The following is a brief summary of four methods of data collection. Take a
- 5. Example Deciding Upon Methods of data collection 1. A study of the effect of changing flight
- 6. Solutions Because it is impractical to create this situation you would want to use a simulation
- 7. Sampling Techniques A random sample – is one in which every member of the population has
- 8. Example Use the TI-83 to generate a sample of 8 students out of 731 to answer
- 9. Stratified Sample Stratified Sample- When it is important to have members from each segment of the
- 10. Example of a Stratified Sample To collect a stratified sample from the number of people who
- 11. When the population falls into naturally occurring subgroups each having similar characteristics, a cluster sample may
- 12. Identifying Sampling techniques You are doing a study to determine the opinio9n of students at your
- 13. Try It Yourself 3 You want to determine the opinion of students at your school regarding
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