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.

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.