Two variables which follow normal distribution eg. height and weight. Height is the variable which has normal distribution as its not like most of the people are very tall or most o them are very short. We have an average height zone and few of the population lies outside this zone who are short or much taller than other. And the variance of the height is not that large because if we consider a large population the difference between the height of individuals will be very small. Weight can also be the variable that has normal distribution if we take a large population, as we can see that most of the people are very fat or most o them are not fat. We have an average weight zone and few of the population lies outside this zone who are thin or much fatter than other. And the variance of the weight is not that large because if we consider a large population the difference between the weight of individuals will be very small.