Sampling Data
a method for selecting a random sample and dividing the population into groups
What is Cluster Sampling
How to get the IQR
What is Q3-Q1
if the probability that they both happen at the same time is zero (2 events)
What is mutually exculsive?
a mathematical description of a discrete RV
What is PDF or probability function?
A method for selecting a random sample used to ensure that subgroups of the population are represented
What is Stratified Sampling
how to determine outliers
What is lower than Q1 - or higher than Q3 + (1.5)(IQR)
if the probability of two events are
P(a)=P(b)
P(b|a)=P(b)
P(a and b)= P(a)P(b)
What is an independent event?
A characteristic of interest in a population being studied
What is a Random Variable?
There are n items from the population selected at random
What is simple random sampling
a graphical representation in x-y form of the distribution of data in the set
What is a Histogram
P(a or b) = P(a)- P(b)- P(a and b)
What is the addition rule?
A CRV that has equally likely outcomes over the domain a<x<b
What is uniform distrubution?
randomly selecting a starting point every nth member from the population is included
What is systematic sampling
used to describe data that is not symmetrical
What is Skewed or skewness?
P(a and b)=P(b)P(A|B)
What is the multiplication rule?
A CRV that appears when we are interested in the intervals of time between some random events
What is the exponential distribution?
What is Convenience Sampling
the ratio of the number of times a value of the data occurs in the set of all outcomes to the number of all outcomes
What is relative frequencey?
P(a) doesn't equal P(b)
What is dependent events?
What is the mean of a probability distribution?