Chapter 9 Flashcards
1
Q
The empirical rule
A
(68-95-99.7)
2
Q
Sample Standard deviation formula
A
S= sqrt(sum(x-XM)^2/ n-1)
XM is mean and N is number of values
3
Q
Population SD
A
= sqrt(sum(x-m)^2 / n
M is population mean and N is population size
4
Q
Binomial Distribution Formula
A
p(r) = P(x-r) = (N over R) P^r Q^n-r
5
Q
Z-score `
A
Measure of how far a point of data is away from the mean in terms of standard deviations.
6
Q
Formula for Z-score
A
z= Data point – mean/ SD
7
Q
One sided question
A
looking at one z score and values greater or less than it
8
Q
two sided questions
A
looking at 2 z scores and values in between or outside of them.
9
Q
Central tendency
A
A way to describe the center of the data
10
Q
Mean
A
Avg
11
Q
Median
A
Number that cuts data in half
12
Q
Mode
A
What appears the most often.
