Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biology exam 84,000 of them were female. In that same year, of the 211,693 students who took the calculus AB exam 132,580 of them were female. Estimate the difference in the proportion of female students taking the biology exam and female students taking the calculus AB exam using a 90% confidence level.
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