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QMP Vocab Week #1
| Term | Definition |
|---|---|
| Hypothesis | statement of the relationship among variables, not a question |
| Operational definition | exactly how to measure the variable |
| Collect Data | results of an experiment in numbers, needs to be usable |
| Analyze results | getting the numbers through formulas |
| Interpret results | the meaning, relating back to hypothesis |
| Share results | publish or make public knowledge your findings |
| Statistics | a set of tools concerned with the collection, organization, and analysis of data, has two branches: descriptive and inferential |
| Data | the numbers |
| Descriptive | describes data, ex. class average |
| Inferential | to make inferences of the data, ex. our class average is all class averages on campus |
| Variable | anything that can take on different values or amounts, two types: independent and dependent |
| Independent | the researcher manipulates, control or experimental group, used to group people |
| Dependent | measurement of behavior, effect not cause |
| Correlation | relationship between two variables |
| population | complete collection of anything, regardless of size of collection |
| sample | subset of population, measured to talk about populations, goal to be unbiased |
| mean | mew |
| number of anything | N |
| parameters | numerical summary characteristics of population, can measure about a populations |
| statistics | numerical summary characteristics of a sample |
| mean of sample | - over x |
| scaling | the assigning of numbers to objects or events |
| 4 scales of measurements | nominal scale, ordinal scale, interval scale, ratio scale |
| nominal scale | assigns a name or label to objects or events, can be #'s, ex. barcodes |
| ordinal scale | objects or events in rank order, just rank alone, not equality, ex. favorite bands |
| interval scale | equal intervals between number, ranks are equal, ex. degrees f to c |
| ratio scale | zero means absence of measurements, true zero, ex. height |
| Frequency Distribution | creating a table of the data that shows the number of times a given group of scores occurs, construction varies, all have x and f columns, |
| x | variable |
| f | frequency |
| cf | cumulative frequency |
| cumulative frequency | number of times a value occurs up to and including that frequency |
| rf | relative frequency |
| relative frequency | the proportion of people on each row, always adds to one |
| percentage | rf x 100 |
| crf | cumulative relative frequency |
| cumulative relative frequency | rf up to and including all values, add to one |
| c% | crf x 100, % of people up to and including any score level |
| results of frequency distribution | lost almost all richness, organized |
| graphing | must label axis, y axis should be 3/4 that of x axis, y axis should use full range, always start y axis at zero |
| histogram | bars touch, good with graphed frequency distribution |
| line graph | connect the points |
Created by:
stophammertime1290
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