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A pollster plans to survey a random sample of voters in a
Chapter 5, Problem 10SE(choose chapter or problem)
A pollster plans to survey a random sample of voters in a certain city to ask whether they support an increase in property taxes to fund the construction of a new elementary school. How many voters should be sampled to be sure that a 95% confidence interval for the proportion who favor the proposal specifies that proportion to within \(\pm\)0.04?
Equation transcription:
Text transcription:
\pm
Questions & Answers
QUESTION:
A pollster plans to survey a random sample of voters in a certain city to ask whether they support an increase in property taxes to fund the construction of a new elementary school. How many voters should be sampled to be sure that a 95% confidence interval for the proportion who favor the proposal specifies that proportion to within \(\pm\)0.04?
Equation transcription:
Text transcription:
\pm
ANSWER:Answer:
Step 1 of 1:
In this question, we are asked to find number of voters sampled to be sure that a 95% confidence interval for the proportion who favor the proposal specifies that proportion to within .
Define and
Then a level
confidence interval for p (proportion) is
………..(1)
Width = ……..(2)