In a particular sector of the industry, a survey is conducted to investigate the extent of absenteeism from duty which is not connected to illness or official holidays. A random sample of 1000 employees out of the total workforce of 36,000 were asked to indicate the number of days they had failed to report to work for the previous six months. They were also asked to give reasons. The following were the results.

Number of days O 2 UJ 4 5 6 7 8 9 Number of employees 451 187 112 49 21 5 11 O