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GB/T 4891-2008 English PDF

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Q: Should I purchase the latest version GB/T 4891-2008?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4891-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 4891-2008: Choice of sample size for estimating the average quality of a lot or process
Status: Valid

GB/T 4891: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4891-2008	279	Add to Cart	3 days	Choice of sample size for estimating the average quality of a lot or process	Valid
GB/T 4891-1985	439	Add to Cart	4 days	Choice of sample size to estimate the average quality of a lot or process	Obsolete

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Basic data

Standard ID: GB/T 4891-2008 (GB/T4891-2008)
Description (Translated English): Choice of sample size for estimating the average quality of a lot or process
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A41
Classification of International Standard: 03.120.30
Word Count Estimation: 12,161
Date of Issue: 2008-07-28
Date of Implementation: 2009-01-01
Older Standard (superseded by this standard): GB/T 4891-1985
Regulation (derived from): Announcement of Newly Approved National Standards No. 12 of 2008 (No. 125 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the simple random sampling under a given level of confidence and margin of error for the estimate batch (or process) the amount of the average quality of the sample selection methods. This standard applies to the grant of a product or process characteristics mean estimate.

GB/T 4891-2008: Choice of sample size for estimating the average quality of a lot or process

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Choice of sample size for estimating the average quality of a lot or process ICS 03.120.30 A41 National Standards of People's Republic of China Replacing GB/T 4891-1985 To estimate the batch (or process) the average mass Select the method of sample size Posted 2008-07-28 2009-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and definitions 3.2 Symbols 2 4 3 General requirements Calculated sample size of 53 Calculate sample size of 6 historical data sample 4 6.1 Equation (1) using the 4 6.2 Equation (2) using 4 6.3 Equation (3) using 6 Sample size calculations 6.07 no historical sample data 7.1 Equation (1) using 6 7.2 Equation (2) using 7 7.3 Equation (3) using the 7 Consider the cost of 7 8 Select 89 samples

Foreword

This standard replaces GB/T 4891-1985 "estimate batch (or process) the amount of the average quality of sample selection methods." This standard and GB/T 4851-1985 the main differences. a) according to GB/T 1.1-2000 requirements, the standard text redrafted; b) increase the Normative References. ISO 3534-1.2006; ISO 3534-2.2006; c) To facilitate the application of the criteria, an increase of related terms and definitions; d) with the "absolute margin of error E (X-μ)", instead of the original standard "precision E (X-μ)"; e) with the general formula for calculating the amount of the general sample confidence level 1-α under, instead of the original standard confidence level of 99.73% under the special formula; g) given the use of a formula (calculated directly) when 1 S expression, delete the original standard accompanying Tables 2 and 3; h) Remove the original standard in Figure 2. The standard proposed by China National Institute of Standardization. Application of this standard by the National Standardization Technical Committee on statistical methods. This standard was drafted. People's Liberation Army Ordnance Engineering College, China National Institute of Standardization, Academy of Mathematics and Systems Science Research Institute, Fuzhou Chun Lun Tea Limited. The main drafters. Zhang Yuzhu, YU Zhen Fan, Chen Min, Ding Wenxing, Great Ideals, Feng Shi Yong, Futian Long. This standard replaces the previous standard release case. GB/T 4891-1985. To estimate the batch (or process) the average mass Select the method of sample size

1 Scope

This standard specifies the simple random sampling, for a given confidence level and margin of error, the average estimate for the mass selective sample batch (or process) Method quantity. This standard applies to a particular feature or batch process mean estimate.

2 Normative references

The following documents contain provisions which, through reference in this standard to become the standard terms. For dated references, all subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to study under this agreement is standard Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 10111-2008 random number generation and its application in product quality sampling in ISO 3534-1.2006 Statistics Vocabulary and symbols - Part 1. General statistical terms and terms used in probability ISO 3534-2.2006 Statistics Vocabulary and symbols - Part 2. Applied Statistics 3 Terms, definitions and symbols 3.1 Terms and Definitions The following terms and definitions apply to this standard. 3.1.1 Overall comprises N sampling units in the sample drawn without replacement by state units, if the probability of any state units are being withdrawn phase Etc., that is equal to 1/C N, claimed that this sampling method is simple random sampling. Note 1. Simple random sampling can use the following methods extracting unit individually. The first unit random sample from the population of all the N sampling units Extraction, and the second sample cell from the rest of the N-1 sampling units at random, and so on. Note 2. Press the simple random sampling to obtain samples called a simple random sample (simplerandom-sample). [ISO 3534-1.2006,1.3.4] 3.1.2 Under specified conditions, the degree of mutual agreement between independent test results. Note. The absolute error limit depends only on the random error, and has nothing to do with the value of true value is measured or other agreement. [ISO 3534-1.2006,4.11] 3.1.3 Sampling for the purpose of pooling part of the same substance has an overall condition. NOTE. The purpose of sampling can be assured of receiving the grant, or estimated average individual characteristics. [ISO 3534-2.2006,1.2.4] 3.1.4 A set of inputs into output of interrelated activities or interacting. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 4891-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 4891-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 4891-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 4891-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 4891-2008?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4891-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.