Statistitics Mid-term Review Crossword

A researcher observes and measures characteristics of interest of part of a population but does not change existing conditions.
A researcher performs an experiment. A treatment IS applied to part of a population and responses are observed.
A researcher uses a mathematical or physical model to reproduce the conditions of a situation or process. Collecting data often involves the use of computers.
A researcher investigates one or more characteristics of a population.
A process of randomly assigning subjects to different treatment groups.
Occurs when a subject reacts favorably to a placebo when in fact the subject has been given no medicated treatment at all.
A technique where the subjects do not know whether they are receiving a treatment or a placebo.
Neither the experimenter nor the subjects know if the subjects are receiving a treatment or a placebo.
The repetition of an experiment under the same or similar conditions.
Number of subjects. Number improves the validity of experimental results.
Occurs when an experimenter cannot tell the difference between the effects of different factors on a variable.
Groups of subjects with similar characteristics.
Divide subjects with similar characteristics into blocks and then, within each block, randomly assign subjects to treatment groups.
Subjects are paired up according to a similarity. One subject in the pair is randomly selected to receive one treatment while the other subject receives a different treatment.
A sample that is chosen randomly to avoid bias.
A type of sampling method in which the total population is divided into smaller groups and then a sample is randomly selected from all of the smaller groups.
A type of sampling method in which the total population is divided into smaller groups and then a sample is randomly selected from some of the smaller groups.
A method of choosing a random sample from a larger population automatically with a pattern.