Comments on: Margin of Error and Confidence Levels Made Simple https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/ Six Sigma Quality Resources for Achieving Six Sigma Results Wed, 13 Sep 2017 02:29:08 +0000 hourly 1 https://wordpress.org/?v=5.2 By: EDWARD GUCKER https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-122 Sat, 16 Jun 2018 00:19:23 +0000 https://www.isixsigma.com/?p=794#comment-122 I feel like I am missing something. If the total population is either 10,000 or 1 million, will a sample of 2000 yield 2% margin @ 95% confidence in both cases?

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By: Deepak Raj Subedi https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-121 Mon, 11 Jun 2018 05:00:16 +0000 https://www.isixsigma.com/?p=794#comment-121 Hi,
I am conducting a household survey in Nepal. I am a bit confused in regards to confidence level and conficence interval. My query is does the total of confidence level and confidence interval be 100%? If one is 95%, then is it that the other is 5%? Can we determine sample size with 99% confidence level and 5% confidence interval?

Regards
Deepak

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By: Nina J. https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-120 Wed, 13 Sep 2017 02:29:08 +0000 https://www.isixsigma.com/?p=794#comment-120 You actually wrote this in a way easy to understand. Thank you!

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By: TPRJones https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-119 Wed, 10 Feb 2016 16:57:35 +0000 https://www.isixsigma.com/?p=794#comment-119 I don’t understand how the margin of error calculation doesn’t take the population size into consideration. I mean if I took a sample of 1000 from a population of 2000 I would think the results would have a smaller margin of error than if I took a sample of 1000 from a population of seven billion. Right? But that doesn’t seem to be the case and I can’t get my head around why that is so.

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By: Aaron https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-118 Sat, 12 Dec 2015 20:21:09 +0000 https://www.isixsigma.com/?p=794#comment-118 Well, “ideal” is relative. But, with a population that small: A sample of 332 would give you a 3% MoE @95% CL.

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By: Brad https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-117 Fri, 28 Mar 2014 16:55:34 +0000 https://www.isixsigma.com/?p=794#comment-117 Just an FYI, this sentence isn’t really accurate:

“These terms simply mean that if the survey were conducted 100 times, the data would be within a certain number of percentage points above or below the percentage reported in 95 of the 100 surveys.”

This implies that the sample percentages would be within the margin of error 95% of the time. That’s not quite right. It should be:

“These terms simply mean that if the survey were conducted 100 times, the actual percentages of the larger population would be within a certain number of percentage points above or below the percentage reported in 95 of the 100 surveys.”

Meaning that the actual population percentages should fall within the margin of error 95% of the time.

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By: James Jones https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-116 Sat, 26 Oct 2013 23:20:18 +0000 https://www.isixsigma.com/?p=794#comment-116 Great explanation, clearly written and well appreciated. Nice to see someone explain a concept simply without trying to write a scientific paper. Plain English. What a wonderful concept.

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By: dataquestionner https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-115 Sun, 20 Oct 2013 23:06:16 +0000 https://www.isixsigma.com/?p=794#comment-115 Hi! Clear explanations – well done! But a question: what if I achieved a high response rate and that my survey sample is close to the overall population size? or when populations are small as well (e.g., people with a disability)? Thanks f

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By: Debasis https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-114 Thu, 15 Nov 2012 05:31:11 +0000 https://www.isixsigma.com/?p=794#comment-114 Thanks. This is very useful and easy to understand too.

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By: FUSEINI OSMAN https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-113 Sun, 24 Oct 2010 19:17:35 +0000 https://www.isixsigma.com/?p=794#comment-113 what should be the ideal sample size and margin of error for a population of 481

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By: dafaalla https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-112 Mon, 04 Oct 2010 18:59:33 +0000 https://www.isixsigma.com/?p=794#comment-112 this is very easy to understand

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By: Jan https://www.isixsigma.com/tools-templates/sampling-data/margin-error-and-confidence-levels-made-simple/#comment-111 Sat, 14 Aug 2010 17:41:19 +0000 https://www.isixsigma.com/?p=794#comment-111 Thank you for putting Statistics into laymen terms. This is my first course in Biostatistics and I feel like I am learning a new language.

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