Across
- 5. _______ sampling; the population falls into naturally occurring subgroups, each representative of the overall population; all members of one or more groups are selected for the study
- 8. the population is divided into subsets that share a similar characteristic and proportional counts of members of each group are randomly selected for the study.
- 9. occurs when a subject reacts favorably to a placebo when in fact he or she has been given no medicinal treatment at all.
- 10. a numerical description of a sample characteristic.
- 12. repetition of an experiment using a large group of subjects to improve the validity of experimental results.
- 14. consist of information coming from observations, counts, measurements, or responses.
- 19. groups of subjects with similar characteristics.
- 21. neither the subject nor the experimenter knows if the subject is receiving a treatment or a placebo.
- 22. a subset of a population.
- 23. a process of randomly assigning subjects to different treatment groups in an effort to obtain unbiased results.
- 24. a technique where the subject does not know whether he or she is receiving a treatment or placebo.
- 27. the subjects involved in an experiment.
- 28. a method of gathering data that uses a mathematical or physical model to reproduce the conditions of a impractical, expensive, or dangerous situation or process.
- 29. every possible sample of the same size has the same chance of being selected.
- 30. a sampling technique in which each member the population is assigned a number, a starting point is randomly selected, and sample members are chosen at regular intervals from the starting number.
- 31. the difference between the results of different samples
Down
- 1. _______ sampling; the population is divided into subsets that share a similar characteristic and some members of each group are randomly selected for the study.
- 2. the science of collecting, organizing, analyzing, and interpreting data in order to make decisions.
- 3. a sampling technique that often leads to biased studies because it consists of only available members of the population. This method is not recommended.
- 4. a numerical description of a population characteristic.
- 6. _________ variables consist of numerical measurements or counts.
- 7. a method of gathering data in which a researcher applies a treatment to part of the population and then observes and measures the responses of interest
- 8. _________ variables consist of attributes, labels, or nonnumerical entries.
- 11. variable occurs when an experimenter cannot tell the difference between the effects of different factors on a variable.
- 13. every member of the population has a equal chance of being selected.
- 15. subjects are paired up according to a similarity. One subject in the pair receives one treatment while the other subject receives a different treatment.
- 16. the full, overall group from from samples are created
- 17. __________ variables can also be called qualitative or nominal
- 18. a harmless, unmedicated treatment given to subjects in an experiment; it is made to look like the real treatment.
- 20. a method of gathering data in which a researcher observes and measures the characteristics of interest of part of a population
- 25. a count or measure of the entire population.
- 26. the difference between the results of sampling and those of the population.
- 30. a method of gathering data which is an investigation carried out by asking people questions by interview, mail, or telephone.