# EMPA Keywords

HideShow resource information
• Created by: qwerty123
• Created on: 15-03-16 08:48
Accuracy
Free from errors and close to the true value
1 of 13
Anomalous Data
Measurements that fall outside of the expected measured values. Large number of readings allow anonymous data to be identified.
2 of 13
A change in one variable is caused by a change in another variable.
3 of 13
Control Variable
A variable that may affect the outcome of the investigation. Must be kept constant throughout the investigation or the effects of the independent variable will not be shown.
4 of 13
Control experiment
Designed to show that it is only the independent variable that has produced the results. Everything except the independent variable is the same.
5 of 13
Control Group
Treated the same as the experimental group except for the factor that is being investigated. This allows comparison.
6 of 13
Correlation
A relationship between two variables, however it may not be a casual one.
7 of 13
Dependant Variable
The variable which is measured for each change in the independent variable.
8 of 13
Independent Variable
Variable for which the values are changed by the investigator.
9 of 13
Null Hypothesis
A hypothesis in terms of there being no difference or no association.
10 of 13
Precision
Measurements will have very little spread about the mean value. Smallest scale on a measuring device.
11 of 13
Probability
This is the likelihood of an even occurring, and can be expressed mathematically.
12 of 13
Reliability
Repeat experiments increase reliability of the mean. If other scientists get the same results, then the results of the initial investigation will be more reliable.
13 of 13

## Other cards in this set

### Card 2

#### Front

Measurements that fall outside of the expected measured values. Large number of readings allow anonymous data to be identified.

Anomalous Data

### Card 3

#### Front

A change in one variable is caused by a change in another variable.

### Card 4

#### Front

A variable that may affect the outcome of the investigation. Must be kept constant throughout the investigation or the effects of the independent variable will not be shown.

### Card 5

#### Front

Designed to show that it is only the independent variable that has produced the results. Everything except the independent variable is the same.