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psych U2M7
statistics
Term | Definition |
---|---|
ordinal | Ordered by rank, no set interval |
ratio | Consistent interval, can have + numbers |
interval | Consistent interval, can have - numbers |
nominal | Categories not ranked by order |
mean | The average of a set of numbers |
median | The middle number in a set of numbers |
mode | The most frequently occurring numbers in a set of numbers. |
frequency statistics | Info related to how often a particular event happens in a particular set of data. |
descriptive statistics | Presentation of info related to one set of data |
frequency of distribution | A table that shows the frequency of various possible outcomes in a sample. |
measures of variability | How much the performance of a group deviates from the mean or median. |
range | The difference between the highest and lowest scores in a set of numbers. |
standard deviation | A computed measure of how much numbers vary around the average score. |
Normal curve | A bell shaped curve that describes the distribution of many types of data. |
Inferential statistics | Numerical to generalize something; to infer from sample data the probability of something being true of a population. |
Sampling error | The more bias there is in a random selection, the more flawed the data is. |
Null hypothesis | Hypothesis that has not yet been proven. Informed consent |
random assignment | assigning people to control and experimental groups |
random selection | every member has an equal chance of being selected so that it can be more likely to represent the target population. |
Perceiving order | Natural tendency to make sense of something |