Term
|
Definition
68% of values fall within 1 s.d.
95% of values fall within 2 s.d.
99.7% of values fall within 3 s.d. |
|
|
Term
Z-Score
(or)
Standardized Score |
|
Definition
z-score = (observed value - mean)
/ (standard deviation) |
|
|
Term
Graphs
for Quantitative Variables |
|
Definition
Histograms
Q-Q Plots
Time Plots
Boxplots
Scatter Plots |
|
|
Term
Graphs
for Categorical Variables |
|
Definition
Bar charts
Pie charts
Frequency tables |
|
|
Term
Conservative (approximately 95%)
Margin of Error |
|
Definition
|
|
Term
| Approximate 95% Confidence Interval for P |
|
Definition
|
|
Term
| Mutually Exclusive/Disjoint |
|
Definition
Two events are mutually exclusive/disjoint if they do not contain any of the same outcomes. So, their intersection is empty.
P(A and B) = 0. |
|
|
Term
|
Definition
Two events are independent if knowing that one will/has occurred will NOT change with probability that the other occurs. |
|
|
