Construct A $90 \%$ Confidence Interval For $\left( p _ { 1 } - p _ { 2 } \right)$

question 18

Essay

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

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Definitions:

IMC

Integrated Marketing Communications (IMC) is a strategic approach to ensuring that all forms of communications and messages are carefully linked together to have a unified and consistent message.

Sender

In communication, the party who initiates the message and transmits it to the receiver.

Decoding

The process by which the receiver interprets the sender’s message.

IMC Message

Integrated Marketing Communications message, which ensures all forms of communications and messages are carefully linked together to provide a unified message across all marketing channels.