Data Presentation and Interpretation (1) Flashcards
1
Q
What represents the mean?
A
x̄
2
Q
x̄
A
What represents the mean?
3
Q
How to calculate mean?
A
x̄ = (Ex/n)
4
Q
x̄ = (Ex/n)
A
How to calculate mean?
5
Q
How to calculate variance?
A
s^2 = ((Ex^2)/n) - x̄
6
Q
s^2 = ((Ex^2)/n) - x̄
A
How to calculate variance?
7
Q
How to calculate standard deviation?
A
s = ¬variance
8
Q
s = ¬variance
A
How to calculate standard deviation?
9
Q
What is the sum of the squares?
A
Ex^2
10
Q
Ex^2
A
What is the sum of the squares?
11
Q
How to calculate frequency density
A
Frequency / class width
12
Q
Frequency / class width
A
How to calculate frequency density
13
Q
How to calculate position of median?
A
n / 2
14
Q
n / 2
A
How to calculate position of median?
15
Q
Calculate estimated median?
A
lcb of class + width of class * (position of median - number of frequencies before class)/(number of readings in class)
