Most married couples have two or three personality preferencesin common. A random sample of 375 married couples found that 134had three preferences in common. Another random sample of 573couples showed that 215 had two personality preferences in common.Let p1 be the population proportion of allmarried couples who have three personality preferences in common.Let p2 be the population proportion of allmarried couples who have two personality preferences in common.
(a) Find a 90% confidence interval for p1 –p2. (Round your answers to three decimalplaces.)
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