Research conducted by the National Center for Health Statistics estimated that 78% of college educated
women who married for the first time between 2006
and 2010 could expect their marriage to last at least 20
years. Suppose a random sample of 1050 college
educated women who married between 2006 and 2010
is selected.
Calculate and interpret the 90% confidence interva
for the proportion of college educated women who
married between 2006 and 2010 who could expect
their marriage to last at least 20 years.