RES 710 - Normal Distribution Application

Using the data from your Wk 3 Mean, Median, and Mode assignment, describe the skewness and kurtosis with the distribution graph.

Mean: 251.48 The Mean is the income of all persons divided by the total number of persons.

Income of all the persons = (X-income* Number of persons) = 30,680

Total persons = (Number of persons) = 122 and Mean = 30680/122 = 251.48

Median: 250

The Median is calculated by arranging the income of all persons in ascending order to find the middle value.

Mode: 280The Mode is the repeated value of income in the data set.

Range: 170

The Range is the difference in the maximum and minimum value of data. Range = 250-180 = 170

Interquartile Range: 80 IQR = 280-200 = 80

Standard Deviation: 13 ((xi-)²/n)^1/2

X (income)	No. of persons
200	24
250	26
180	16
300	20
350	6
280	30