what is normal distribution z why is z$ a censored model why is it called censored what is the formula for censored distribution and what is the function for censored distribution what is meant by the word censored why is $Z$ censored what is the normal distribution of $z$ why is z$ a standard normal distribution when a density is truncated what is the result of the assumption that $z$ is censored? what is $Z$ what is censored what is censored distribution what is $z$ what is the difference between a normal distribution and a censored distribution? what is censored distribution what is $z what is standard average normal distribution is z$ censored which model is censored in $Z$ where is z$