Stats math test Flashcards
1
Q
What are the four columns you add?
A
Histogram - class width and frequency density
Box plot - mid point and mid point x frequency
Or you can use all four columns
2
Q
How do you find estimate mean?
A
sum of mid point x frequency divided by sum of frequency
3
Q
How do you find the UQ?
A
3/4 of the number
4
Q
How do you find LQ?
A
1/4 of the number
5
Q
How do you find the IQR?
A
UQ - LQ
6
Q
How do you write probabilty?
A
As a fraction
7
Q
How do you work out the area of a bar?
A
Frequency density x number of squares / width
8
Q
How do you find cumulative frequency?
A
By adding each frequency on one by one
9
Q
When finding the median on cumulative frequency graphs, what do you half?
A
The cumulative frequency top number ( not the graph axis )
10
Q
How do you find the range?
A
max - min
