Question 252519
the first thing to do is finish the table with totals for us population for each year in question
REGION 1995 1997 2000
Northwest 51.4 51.6 53.6
Midwest 61.8 62.5 64.4
South 91.8 94.2 100.2
West 57.7 59.4 63.2
sum(1995)=51.4+61.8+91.8+57.7
sum(1997)=51.6+62.5+94.2+59.4=267.7
sum(2000)=53.6+64.4+100.2+63.2
a) lived in west in 1997
59.4/267.7=.2219=.222
so the part over the whole= probability