probability distribution Flashcards
it applies the theory of probability to describe the behavior of the random variable
probability distribution
determines the probability associated using either a graph or a mathematical formula.
continuous
specifies all possible outcomes of the random variables along with the probability that each will occur.
discrete
calculated from a finite amount of data.
empirical probabiliity
- is the likelihood of an event happening based on actual data or past experiences. Instead of theoretical predictions, it uses real-world observations to calculate how often something occurs. For example, if you flip a coin 100 times and it lands on heads 55 times, the empirical probability of getting heads is 55/100, or 55%.
It’s like saying, “Based on what we’ve seen happen before, this is how often we expect it to happen again.”
distribution of many other variables of interest based on theoretical considerations.
theoretical probability
can take on one of two values of the variables
binomial distribution
failure = 0
success = 1
what does it mean if in binomial distribution , the outcomes are exhaustive
it is the complete coverage, all possible outcomes/ results f an experiment or scenario are accountable for = complete and accurate
When the distance of an event X is very rare and is dwarfed by the total population,
poisson distribution
poisson distribution is aka
distribution of rare events
which distribution is continous and discrete
continuous - normal distribution
discrete - binominal and poisson
what happens as the number of possible values approaches infinity and the intervals between them approach zero
the curve is more smooth and continuous
gaussian curve and bell curve is aka
bell shape curve or simple bell surge
*it is the common continous distribution
explain why the gaussian curve does not touch both ends
as they have outliers
A smooth curve is used to represent the probability distribution of a continuous random variable
probability density
*probability are represented by the area under the curve ratheer than the individual points
it shows the likelihood of different values occurring within the distribution
probability density function
(it is the curve itself)