Lesson 1: Introduction to Psychological Statistics
Cards (14)
- is the science concerned with developing and studying methods for collecting, analyzing, interpreting and presenting empirical data.
- are used to organize or summarize a particular set of measurements; these are employed by the researchers when their purpose is merely to describe a set of data; E.g. graphs, calculation of means (average) and examining the extreme scores
- use a random sample of data taken from a population to describe and make inferences about the population.
- a measure that refers to an entire population; the REAL entities of interest.
- a measure calculated from a sample of data that we have collected; GUESSES at reality.
- is used more broadly and is more appropriately termed scales of measurement.
- ways in which variables/numbers are defined and categorized.
- The four scales of measurement are
- E.g Male or Female, Republican or Democrat, number in the jersey, etc.
- It also represents an ordered series of relationships or rank order
- A measurement scale in which we can legitimately speak of differences between scale points. • A scale which represents quantity and has equal units but for which zero represents simply an additional point of measurement.
- Highest and most informative scale; With these scales, we have the properties of not only the preceding scales but we also can speak about ratios. E.g. length, volume, time, etc.
- involves randomly selecting a number of participants from a group.
- requires randomly selecting participants from different subsets of the population. These subsets might include characteristics such as geographic location, age, sex, race, or socioeconomic status.