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Stats Keywords
Term | Definition |
---|---|
Population | The entire group being studied |
Data | An unordered list of gathered responses |
Primary data | Data that has been collected by the person who is going to use it |
Secondary data | Data that has been collected by someone other than the person who is going to use it |
Census | A survey of the entire population |
Survey | A method of collecting data |
Questionnaire | A set of questions designed to obtain data from a population. |
Discrete | A numerical value that can only be of a certain value |
Continuous | A numerical value that can be any number in a range |
Ordinal | Categorical data that follows a clear order |
Nominal | Categorical data where the order is irrelevant |
Sample | A smaller group that has been selected from the population. |
Bias | When results are skewed towards an outcome |
Random | When an object/person chosen with no preference over another |
Axes | Reference lines where values or labels can be written |
X-axis | The line on a graph that runs horizontally through (0,0) |
y-axis | The line on a graph that runs vertically through (0,0) |
Mean | The sum of all values divided by the amount of responses |
Mode | The value that appears most often in collected responses |
Median | The middle value of an ordered data set |
Outlier | A value that is very different from the rest of the data set |
Range | This is the difference between the maximum and minimum values in a data set |
Quartile | Dividing the ordered data set into four sets with an equal amount of responses in each |
Interquartile range | Measure of spread between the Upper Quartile and the Lower Quartile. |
Quartile 1 | The data value that is one quarter of the way through the data. |
Quartile 3 | The data value that is three quarters of the way through the data |