Gloria Chavez and Ronald Flynn are the candidates for mayor in a large city. You are planning a sample survey to determine what percent of the voters intend to vote for Chavez. You will contact a SRS of registered voters in the city. You want to estimate the proportion p of Chavez voters with 95% confidence and a margin of error no greater than 3%, or 0.03. How large a sample do you need? In the absence of any earlier poll to start from, use the guess p* = 0.5. n =

Step-by-step explanation:

Hello!

The variable of interest is:

X: number of people that voted for Gloria Chavez for mayor.

You need to calculate sample size in order to estimate the population proportion of people that voted for Gloria Chavez for mayor using a 95% confidence level, an estimated proportion of 0.5 and a margin error no greater than 0.03.

The general structure of the CI for the population proportion is "point estimator" ± "margin of error"

The formula for the interval is

p' ±

Where d= is the margin of error of the interval.

Now you have to clear the sample size, n, from the formula.

d=

To estimate the proportion of people that voted for Gloria Chavez you need to take a sample of n= 1073 voters.

I hope it helps!

f(x) = y

f(-3) = -5

step-by-step explanation: