02 measures of location and spread Flashcards
(6 cards)
1
Q
How can the mean be written using ‘x’
A
x with a bar over it
2
Q
What happens if data has more then 2 modes?
A
it doesn’t have a mode
3
Q
What is the inter-percentile range?
A
difference between 2 given percentages
4
Q
What is variance in terms of standard variation?
A
(standard deviation)squared
5
Q
When dealing with grouped data in frequency tables, what value should you use when finding variance and SD?
A
The midpoint
6
Q
What is coding?
A
a way if simplifying statistical calculations
