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#1 2016-09-03 00:48:15

markosheehan
Member
Registered: 2016-06-15
Posts: 51

statistics

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?

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#2 2016-09-03 01:28:43

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: statistics

Hi;

A) I thought the margin of error at 95% confidence is about equal to or smaller than the square root of the reciprocal of the sample size. The formula is

is this the same as the "overall margin of error?"


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#3 2016-09-03 08:27:29

markosheehan
Member
Registered: 2016-06-15
Posts: 51

Re: statistics

they use the formula 1/root n on my course where n stands for the size of the sample i all ready worked out the first bit but i cant work out the second part of the question

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#4 2016-09-03 17:40:51

thickhead
Member
Registered: 2016-04-16
Posts: 1,086

Re: statistics

Last edited by thickhead (2016-09-03 17:41:19)


{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

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