Ok this may be hard but I found this on my test ;--; 6*8*9*4*3/6/8/93-9-6*4*99-0=

and now im freaking out cause im not good in math so can someone help...I only have 20 minutes left ;--;

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample