A company has made some changes tro the way its employees work. the manager wants to know if these changes have made any difference to the number of days employees take off work because of illness. she cant jnust compare the total days as there are fewer people working in each department after the changes. did the changes make any difference to the average number of days that employees took off sick before changes
:14,12,11,8,12,0,15,6,11,3,10,7,0,5 ,8,10,15,16,14,3

after changes
:12,0,2,11,3,7,14,10,10,3,8,9,8,4,4 ,