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1.A random sample of 500 private car owners in Manila found that 385 were in favor of increasing the highway speed limit to 120 kmph,

1.A random sample of 500 private car owners in Manila found that 385 were in favor of increasing the highway speed limit to 120 kmph, and another sample of 400 adult in Quezon City indicated that 267 were in favor of the increased speed limit. Construct a 95% confidence interval on the difference in the two proportions. Provide a practical interpretation of this interval.

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