Information that is known about the distribution (for example, known standard deviation), and The pdf is symmetrical about its mean of zero.

There is a family of t -distributions: Each representative of the family is completely defined by the number of degrees of freedom, which is one less than the number of data It is continuous and assumes any real values

standard deviation — a number that is equal to the square root of the variance and measures how far data values are from their mean; notation: s for sample standard deviation and σ for population…. family — completely defined by the number of degrees of freedom, which is one less than the number of data. pdf — symmetrical about its mean of zero. binomial distribution — a discrete random variable (RV) that arises from Bernoulli trials; there are a fixed number, n , of independent trials Independent means that the result of any trial (for….