1.

(a) On May 4, 1894 there 3.4% of the US population had asbestosis

(b) Between June 1 and December 4 1994 1.2% of Madison construction workers

had lower back injuries

(c) In 2001, there were 7.8 new occupational injuries per 100 FTEs in the

construction industry.

• Which of the statements above are prevalence rates and which, if any, are incidence rates?
• Depending on the frequency weighted acceleration of tools, it takes between 0.5-20 years to develop hand-arm-vibration syndrome. What is the period between 0.5 and 20 called?

2.Why do you think it is important to involve so many departments in safety?