RMH Flashcards
1
Q
Difference in a continuous or categorical/discrete variable?
A
Continuous is a variable that can have a decimal or multiple options, e.g. weight
Discrete is a variable with only one option e.g. male/female
2
Q
What’s a histogram useful for?
A
Spotting outlier or potential errors
Visualising the distribution
3
Q
On a histogram how could you tell if data was skewed?
A
Bell shaped (rise in the middle) = normal
A ‘tail’ skewed either positively or negatively, positive if peak on the right.
4
Q
When would you use the mean in data?
A
Normally distributed variables
5
Q
What is the standard deviation?
A
Average distance from the mean
6
Q
When would you use interquartile range?
What would it tell you?
A
In skewed data
Would tell you the variability
