Means, Quartiles, Standard Deviation and Coding Flashcards
1
Q
What is the symbol for the mean?
A
X with - over
2
Q
What is the equation for the mean?
A
Ex/n
3
Q
How do you find values on the calculator? (mean etc)
A
Calculator - menu - 6 - 1 - fill in the table - AC - OPTN - 2
4
Q
What percentage is each quartile?
A
LQ - 0-25%
Median - 50%
UQ - 75-100%
5
Q
What is the symbol for standard deviation?
A
(sideways) 6x
6
Q
What is the equation for standard deviation?
A
____________
/(Ex^2)/n - x(-)^2
7
Q
What is the symbol for the variance?
A
(sideways)6^2x
8
Q
What happens to y as you change x?
A
it changes the same
e.g.
x(-) + 10 = y(-) + 10
6x = 6y
y(-) = 2x(-) 6y = 26x
