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Answer:
The margin of error for the Camp Verde survey will be between one and three times as great as the margin of error for the Gilbert survey.
Step-by-step explanation:
The statement which is true, the margin of error for the Camp Verde survey will be between and the size of the margin of error for the Gilbert survey.
What is margin of error?
The probability or the chances of error while choosing or calculating a sample in a survey is called the margin of error.
[tex]MOE_\gamma=z_{\gamma}\dfrac{\sigma ^2}{n}[/tex]
Here, γ is the confidence interval, σ is standard deviation and n is the sample.
The mayor of Gilbert, AZ, randomly selects 300 of its residents for a survey while the mayor of Camp Verde, AZ, randomly selects 100 of its residents and asks them the same question. Thus,
[tex]n_1=300\\n_2=100[/tex]
Both surveys show that 15% of the residents of each town want Arizona to start using daylight savings like most of the rest of the country.
The confidence level for both surveys is 95% (z*-value 1.96). Thus, comparing the MOE of both the data as,
[tex]\dfrac{MOE_2}{MOE_1}=\dfrac{z_{\gamma}\sqrt{\dfrac{\sigma ^2}{n_2}}}{z_{\gamma}\sqrt{\dfrac{\sigma ^2}{n_1}}}\\\\\dfrac{MOE_2}{MOE_1}=\dfrac{\sqrt{\dfrac{1}{100}}}{\sqrt{\dfrac{1}{300}}}\\\dfrac{MOE_2}{MOE_1}=1.73[/tex]
Thus, the statement which is true, the margin of error for the Camp Verde survey will be between and the size of the margin of error for the Gilbert survey.
Learn more about the margin of error here;
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