statistics

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markosheehan
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statistics

Postby markosheehan » Sat Sep 03, 2016 1:17 pm UTC

A survey is being conducted of voters’ opinions on several different issues.
(i) What is the overall margin of error of the survey, at 95% confidence, if it is based on a
simple random sample of 1111 voters.
(B) A political party had claimed that it has the support of 23% of the electorate. Of the
voters in the sample above, 234 stated that they support the party. Is this sufficient
evidence to reject the party’s claim, at the 5% level of significance?

does anyone know how to work this out. i can do the first part easy its 1/√1111 i dont know how to do the second part b

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Zohar
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Re: statistics

Postby Zohar » Sat Sep 03, 2016 2:56 pm UTC

Maybe you should ask the teacher who posed you this question for some advice, instead of asking us to do your homework?
Mighty Jalapeno: "See, Zohar agrees, and he's nice to people."
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Cauchy
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Re: statistics

Postby Cauchy » Sat Sep 03, 2016 5:13 pm UTC

Why is that the correct value for part (a)?

What does margin of error mean? What does the poll say the actual percentage is? What is the 5% level of significance?
(∫|p|2)(∫|q|2) ≥ (∫|pq|)2
Thanks, skeptical scientist, for knowing symbols and giving them to me.


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