Presentation of data Flashcards
What do discrète and continuous variables give rise to
Qualitative, quantitative or ranked data
What’s qualitative data definition
Data which is subjective and descriptive
What is quantitative data definition
Data which can be measured objectively, usually with a numerical value
What is ranked data definition
Data transformation in which numerical values are replaced be their rank when data is sorted from lowest to highest
What are error bars
Are graphical representations of the variability of data and used on graphs to indicate the error or uncertainty in a reported measurement
What do large error bars indicate
High variability
What is correlation definition
A relationship between two variables where they both follow the same pattern. Correlation is an association and does not imply causation.
What’s a positive correlation definition
Exists when an increase in one variable is accompanied by an increase in the other variable
What’s negative correlation definition(look at graphs in jotter)
Exists when an increase in one variable is accompanied by a decrease in the other variable
The types of variables being investigated has consequences on what
For any graphical display or statistical tests that may be used
What happens to the graph when there is a string positive correlation
Increase
What happens to the graph when there is a weak negative correlation
Decrease
What does the graph look like when there is no correlation
Dots spread out everywhere
When does correlation exist
When there is a relationship between two variables
What’s the order of values in a box plot
Median, lower quartile, upper quartile and inter quartile range
