3. Interpret calculator display: The following TI-84 Plus calculator display presents a 99% confidence interval for...

3. Interpret calculator display: The following TI-84 Plus calculator display presents a 99% confidence
interval for the difference between two proportions.
a. (1pt) Compute the point estimate of p1 − p2. Round to the nearest thousandth.
b. (2pt) Fill in the blanks: We are 99% confident that the difference between the proportions is
between ___________and_____________ . Round values to the nearest thousandth.

Expert Solution

Let P1 hat = 0.8621 and P2 hat = 0.6694

and n1 = 87 , n2 = 124

Point estimate (P1 - P2) = P1 hat - P2 hat = 0.8621 - 0.6694 = 0.1927

We are 99% confident that the difference between the proportions is
between ___________and_____________

orchestra answered 2 years ago

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