| A | B |
|---|
| variable | factors that can be given different values in an experiment |
| independent variable (IV) | variable that is changed purposely by the expeimenter |
| dependent variable (DV) | the factor or variable change as a result in the independent variale purposely made |
| an hypothesis | a prediction of how an IV & DV will react with each other |
| supported hypothesis | when data from the experiment agrees with the hypothesis |
| not supported hypothesis | when data does not agree with the hypothesis |
| constants | factors in the experiment that stay the same & NOT allowed to change |
| levels of the IV | number of ways an (IV) can be purposely changed |
| controls | a factor/thing used to compare or detect the effects of a constant in an experiment |
| no treatment control | control that receives no IV |
| experimenter selected control | experimenter chooses one level of the IV to be standard of comparison |
| data | info gathered in an experiment (EX): measurements, counts, or observations |
| counts | number of data items |
| repeated trials | number of times that a level of the independent variable is tested in an experiment |
| mean (average) | most central value in a set of quantitative data (mean= sum of all measurements divided by total number of measuements |
| obervations | data that describes such as shape, color, or gender |
| mode | central value of a set of qualitative data (value that occurs most often) |
| qualitative data | verbal descriptions/info gathered using scales without intervals or zero points |
| quantitative data | info gathered from counts or measurements having equal sized intervals & a zero value |
| range | calculated by subtracting the smallest value from the largest value |
| derived quantity | info determined by calculating collected data (EX: means, median, mode, range) |
| data table | a chart to organize collected data in an experiment |
| median | central value in a set of data ranked from highest to lowest |
| graph | a picture of data |
