3.2f - Presentation of Data Flashcards
Discrete and continuous variables give rise to…
qualitative, quantitative or ranked data
Qualitative data is…
subjective and descriptive
Quantitative data can be…
measured objectively, usually with a numerical value
Ranked data refers to…
the data transformation in which numerical values are replaced by their rank when the data are sorted from lowest to highest
The type of variable being investigated has consequences for…
any graphical display or statistical tests that may be used
The mode is…
the value that appears most frequently in a data set
The mean is…
the average of the numbers
The median is…
is the middle number in a data set
In a box plot the ordered data is split into…
4 sets, each with 25% of the data values
In a box plot the upper quartile is…
the highest 25%
In a box plot the lower quartile is…
the lowest 25%
In a box plot the interquartile range is…
the middle 50% and contains the median value
If the median value is not in the centre of the box plot then…
it will differ from the mean value
When standard deviation error bars overlap quite a lot…
the difference is not statistically significant
When standard deviation error bars overlap less…
the difference is probably not statistically significant
