As a pollster, you randomly called 725 voters to know their positions on a California State’s...

As a pollster, you randomly called 725 voters to know their positions on a California State’s ballot proposition. Only 80% of the voters agreed to answer your questions. Of those who answered you, 264 voters favored the proposition.

(a)[2] Explain why this situation should not be considered as the finite population case.

(b)[2] Check if the sampling distribution of the sample proportion can be approximately Normal.

(c)[3] Construct the 92% CI for the favor proportion π. Sketch the CI. State if π can be 0.50.

(d)[3] Construct the 96% CI for the favor proportion π. Sketch the CI. State if π can be 0.45. Hint: Use 5 decimal places. Use some Excel lookups for values and probabilities.

Expert Solution

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Part c)

Sketch of 92% confidence interval.

Part d)

Sketch of 96% confidence interval.

orchestra answered 2 years ago

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