PAAS- Week 7-describing measurements, measurements of spread Flashcards
1
Q
What is the measure of spread used for ?
A
To describe the variability in a sample or population.
2
Q
Can you have two sets of data with the same center- but different amounts of spread?
A
YES!
3
Q
What is the range?
Is it useful?
A
The distance between the smallest and largest values.
No- it doesn’t tell us how spread out the data is- gives us limited information.
4
Q
what is the interquartile range & is it useful?
A
Take data- divide it into quarters.
More useful than the range- gives sense of how close stuff is to the center of the data.
You can have data sets that are different but have the same interquartile range.
Useful if expect data to be normally distributed- but not useful overall as ignores lots of information.
