A random sample of 230 people living in Seattle found that 83 of them had a pet. A random sample of 172 people in Spokane found that 47 of them had a pet. Let p-hat 1 be the proportion of pet-owners in Seattle and p-hat 2 be the proportion of pet owners in Spokane. Find an 80% confidence interval for the difference in proportions. Use three decimals when computing the proportions and give your final answer to three decimal places.

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