A normal distribution occurs when there is a symmetrical distribution of the elements around the mean.
The following would have this type of distribution: SAT scores for high school seniors shoes sizes of 17 year-old males age at which a child loses his or her first tooth
SAT scores of high school senios can be expected to be normal
IIoption cannot be correct as this salaries would be higher than average and need not be bell shaped so nor notmal
III Option show sizes of 17 year old mates can be expected to be normal
IV option is also normal since the age at which a child loses his or her teeth would have population of large size with mean and symmetrical distribution
IV option is incorrect as between 1 and 6 is a certain event with p = 1
