Unit 1
Discrete data?
Statistics that can only have a full specific number value. (Number of people in a building)
Accidental Relationship
When there is no relationship between the two but the correlation is observed.
Permutation
House Advantage
An advantage set by casinos to ensure they always make money
Probability distribution
A graph that shows all possible probabilities.
Continuous Data?
Data that can be all values in a range (Race times)
A students stress level is correlates with amount of homework
Common cause (Homework stresses students)
Factorial
To show the repeating of consecutive but decreasing numbers
if you add all the probabilities, the total will always be 1
Sum of probabilities
Uniform distribution
Census
A survey of the whole sample size that is used to answer questions
Common Cause
When a third variable causes the other two variables to change (Weather causes more accidents and less people on the road)
When is rule of sum used?
When it is either one event or the other occurring.
Theoretical Probability
Probability of all outcomes given they all have the same outcomes
Binomal Distribution
specified number of outcomes with 2 outcomes success or failure.
Cluster Sampling
When the sample size is determined by who is present (Survey taken at a local Walmart
Exponential Function formula?
Y=A(BX)
The sum of two previous equals the next term
Mutually exclusive events
events that share common characteristics that allow them to happen at the same time.
E(N)=np
Expectation for binomial distribution
Systematic Random Sampling
Conducting the survey in intervals. (Asking every 10 people that walk past)
Y=AX2+bx+c
is an example of?
Quadratic Function
Patterns in pascals triangle
Sum of rows
Combination
Hockey Sticks
Formula for odds in favour (without probability)
n(a)/n(A1)
The probability of success changes every trial (Taking a ball out of a bucket without replacing.
Hypergeometric Distribution