which of the following is a characteristic of the probability distribution function? what is concave distribution what is the probability distribution that is bell shape which function has concave and concave properties what is the probability distribution function cdf what type of distribution is the probability distribution $f(x)$? what is the cdf of a gamma distribution what two parameters are used to normalize a probability distribution what is the shortest probability distribution what is the gamma distribution what is the distribution of cdf for math what are the properties of a cdf why is the cdf function useful what is the cdf what distribution function is bell shaped what is the cdf of the probability distribution which type of probability distribution is closest to the log-normal distribution? how does the cdf distribution work which type of distribution is the closest which type of function has a concave convex parameter and gamma parameter