Unit 1 31-40

Question 1

Standard deviation

Answer 1

A computed measure of how much scores vary around the mean score

Question 2

Normal curve

Answer 2

A symmetrical bell-shaped curve that describes the distribution of many physical and psychological attributes. Most scores fall near the average, and fewer and fewer scores lie near the extremes

Question 3

Inferential stats

Answer 3

Numerical data that allow one to generalize- to infer from sampling data the probability of something being true of a population

Question 4

Meta analysis

Answer 4

A statistical procedure for analyzing the results of multiple studies to reach an overall conclusion

Question 5

Statistical significance

Answer 5

A statistical statement of how likely it is that an obtained result occurred by chance, assuming there is no difference between the populations being studied

Question 6

Effect size

Answer 6

The strength of a relationship between two or more variables. The larger the effect size the more one variable can be explained by the other

Question 7

Quasi-experimental research

Answer 7

Research in which the investigator cannot randomly assign units of participants to conditions, cannot generally control or manipulate the IV, and cannot limit the influence of extraneous variables

Question 8

Testability

Answer 8

The degree to which a hypothesis or theory is capable of being evaluated empirically

Question 9

Null hypothesis

Answer 9

A statement that a study will find no meaningful differences between the groups of conditions under investigation, such that there is no relationship among the variables of interest and that any variation in observed data is the result of chance or random processes