The F-distribution, also known Fisher-Snedecor distribution, is used to test for equality of variances from two normal populations.
A bi-modal distribution has two modes. In other words, outcome of two processes with different distributions are combined in one set of data.
The normal probability plot is a graphical technique for normality testing. Used to assess data set follows normal distribution.
The chi square (χ2) distribution is the best method to test a population variance against a known or assumed value of the population variance
Data distributions is a function that specifies all possible values for a variable and also quantifies the relative frequency.