1 / 6

Lesson 1 - 2

Lesson 1 - 2. Observational Studies, Experiments, and Simple Random Sampling. Objectives. Distinguish between an observational study and an experiment Obtain a simple random sample. Vocabulary. Census – list of all individuals in a population along with certain characteristics

trish
Download Presentation

Lesson 1 - 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Lesson 1 - 2 Observational Studies, Experiments, and Simple Random Sampling

  2. Objectives • Distinguish between an observational study and an experiment • Obtain a simple random sample

  3. Vocabulary • Census – list of all individuals in a population along with certain characteristics • Frame – a list of all individuals in a population • Observational Study – measures the characteristics of a population by studying individuals in a sample; but does not try to influence the variable(s) of interest • Designed Experiment – applies a treatment to individuals (experimental units or subjects) and attempts to isolate the effects of the treatment on a response variable • Lurking variables – variables not identified in the study, but may be effecting the response variable • Simple random sample – every possible sample of size n has an equally likely chance of being selected from a population of size N

  4. Four sources of data • Census • Existing sources • Survey sampling • Designed experiments

  5. Four basic sampling techniques • Simple random sampling (SRS) • Stratified sampling • Some of all • Cluster sampling • All of some • Systematic sampling

  6. Summary and Homework • Summary • Homework • pg 19 – 21; 9-18, 20, 21

More Related