This lesson will help you understand the characteristics of frequency distributions. Brushing up on these concepts now will help you tackle your finance coursework later. Be sure to complete the Concept Check at the end of the lesson to cement your skills and receive credit. Why is a frequency distribution useful? It can visually identify the mean. It allows researchers to of the data. It sales researches how often the mean occurs in a of data. It ignores the is defined by its mean and standard deviation alone median distribution. normal distribution. marginal distribution. frequency distribution. Approximately % of the data a given sample falls within three standard deviations of the mean if it is normally distributed. 99 34 68 95 A data set is said to be if the mean of the data is greater than the median of the data. right left normally distributed. frequency distributed