| A | B |
|---|
| Accuracy | How close the measurement is to the true value |
| Anomalous data | Measurements that fall outside the expected range |
| Causal link | A change in one variable causing a change in another variable |
| Confounding variable | This affects the result so must be monitored or kept constant |
| Control experiment | This eliminates the possibility that another factor has produced the results obtained |
| Positive Correlation | A relationship that shows when one variable increases, the other variable increases |
| Negative Correlation | A relationship that shows when one variable increases, the other variable decreases |
| Dependent variable | The variable that is measured when the independent variable changes |
| Independent variable | The variable that is deliberately changed in an investigation |
| Reliability | This is improved by carrying out repeat measurements |
| Mean | Adding repeat measurements up and dividing the total by number of measurements |
| Range | The difference between the largest and smallest measurement |
| Standard deviation | The spread of data around the mean |
| Large sample size | This increases reliability as anomalous data can be identified |
| Random sampling | This eliminates bias as it is not subjective |
| Overlapping SDs | This indicates that any difference between two means is not significant |
| Errors | These cause readings to be different from the true vale |
