3. A random sample of 21 patients yielded the following data on length or stay (in days) in a hospital. 4, 4, 12, 18, 9, 6, 12, 3, 6,15, 7, 3, 55, 1, 10, 13, 5, 7, 1, 23, 9 (a) Obtain and interpret the ve-number summary. (10 marks) {b} Obtain and interpret the interquartile range. (4 marks) (c) Are there any potential outliers? Justify by calculation. {3 marks) (d) Draw a box plot based on the data. Describe the distribution of the data. (5 marks) (e) Choose the proper measures for the centre and spread (variation) of the data. Verify your choice