state the difference between pdf and pmf in probability distribution
Probability mass function A probability mass function differs from a probability density function (pdf) in that the latter is associated with continuous rather than discrete random variables; the values of the probability density function are not probabilities as such: a pdf must be integrated over an interval to yield a probability.[2]
p-chart The binomial distribution is the basis for the p-chart and requires the following assumptions:[2]:267
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.
Standard deviation Let X be a random variable with mean value Î¼: