Construct a 90% confidence interval for $$\left( p _ { 1 } - p _ { 2 } \right) \text { when } n _ { 1 } = 400 , n _ { 2 } = 550 , \hat { p } _ { 1 } = .42 , \text { and } \hat { p } _ { 2 } = .63$$

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The Answer of Construct a 90% confidence interval for $$\left( p _ { 1 } - p _ { 2 } \right) \text { when } n _ { 1 } = 400 , n _ { 2 } = 550 , \hat { p } _ { 1 } = .42 , \text { and } \hat { p } _ { 2 } = .63$$

Construct a 90% Confidence Interval For