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Random Sampling Error Ppt


Advantages of SRS Minimal knowledge of populationneeded External validity high; internalvalidity high; statistical estimationof error Easy to analyze data 26. Advantage Moderate cost; moderate usage External validity high; internal validityhigh; statistical estimation of error Simple to draw sample; easy to verify 39. UniverseCensusSample PopulationSample FrameElements 11. A. http://vealcine.com/sampling-error/random-sampling-and-sampling-error.php

Simple Random Sampling The purest form of probability sampling Assures each element in the population has anequal chance of being included in the sample Random number generators 20. Such errors can potentially arise at any stage of the measurement 5. Unfortunately control over all the exogenous variable is not always possible – which may lead to an inclusion of bias in the experiments. the inability to contact all the members of the sample and (b) Refusal i.e.

Types Of Sampling Errors In Research

Sampling ErrorSampling error refers to differencesbetween the sample and the populationthat exist only because of the observationsthat happened to be selected for thesampleIncreasing the sample size will reduce thistype of error Experimental Error: It can be defined as the non-correspondence of the “true impact of” and the “impact attributed to” the independent variable. SamplePopulation ofInterestSamplePopulation SampleParameter StatisticWe measure the sample using statistics in order to drawinferences about the population and its parameters. 10.

It is very easy and convenient to draw the sample fromhomogenous population 6. Attitudes, beliefs and SEC classification are all examples of surrogate in formation because based on these information we try to predict the future behavior of the respondents. We shall first look at the component of errors and then the type of errors. Sampling And Nonsampling Errors In Research Methodology By Neeraj Kumar Recommended Top 10 Social Media Management Tools Introduction to Content Marketing Social Media Marketing with Facebook and Twitter SAMPLING AND SAMPLING ERRORS rambhu21 Errors in research Abinesh Raja

For example a sampling frame that specifies the population as all adults using oral care products – may well leave out people who prefer using neem and babool sticks, homemade toothpaste Sampling Error Pdf Process by which the sample are taken frompopulation to obtain the informationSampling is the process of selecting observations (asample) to provide an adequate description andinferences of the populationSAMPLING 13. Secondary sources of data are another source of surrogate information. If you continue browsing the site, you agree to the use of cookies on this website.

B. Sampling And Nonsampling Errors Pdf Share Email SAMPLING AND SAMPLING ERRORS byrambhu21 27247views Errors in research byAbinesh Raja M 15703views Type i and type ii errors byp24ssp 7640views sampling ppt bySwati Luthra 25761views Sampling Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. You can keep your great finds in clipboards organized around topics.

Sampling Error Pdf

Advantage Low cost/high frequency of use Requires list of all clusters, but only of individuals withinchosen clusters Can estimate characteristics of both cluster andpopulation For multistage, has strengths of used methods Multistage sampling refers to sampling planswhere the sampling is carried out in stagesusing smaller and smaller sampling units at eachstage.Not all Secondary Units Sampled normally usedto overcome problems associated with ageographically Types Of Sampling Errors In Research Measurement Error The question is unclear, ambiguous or difficult toanswer The list of possible answers suggested in the recordinginstrument is incomplete Requested information assumes a frameworkunfamiliar to the respondent The definitions How To Reduce Sampling Error A useful way of looking at the marketing research process is that involves the management of errors.

Your cache administrator is webmaster. useful reference Generated Mon, 24 Oct 2016 08:48:39 GMT by s_ac4 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection Faulty wording of question, non-preparation of non-verbal clues, behavior of the interviewer etc may all contribute to how the respondent interprets the question. DisadvantagePeriodic orderingRequires samplingframe 40. Sources Of Sampling Error

Embed Size (px) Start on Show related SlideShares at end WordPress Shortcode Link Sampling Errors 1,454 views Share Like Download Neeraj Kumar, Marketing/HR Follow 0 0 0 Published on May The system returned: (22) Invalid argument The remote host or network may be down. However bias is a type of systematic error which enters into the process because of un-calibrated instruments or prejudices of the researcher. my review here Constraints of time on the part of the respondent, a bad experience with some previous interviewer, ill health etc.

Or in other words, information is obtained from substitutes rather than original sample. Difference Between Sampling Error And Nonsampling Error may be other reason for refusal. Characteristics of Good SamplesRepresentativeAccessibleLow cost 12.

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If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. Interviewer Error Respondent Selection Error: Selection of respondent is wrong Questioning Error: The way questions are asked Recording Error: The data is not recorded correctly Cheating Error: The data is compromised How To Avoid Sampling Error SAMPLE•It is a Unit that selected from population•Representers of the population•Purpose to draw the inference 4. Very difficult to study each and every unit of thepopulation when population unit are heterogeneousWHY

Advantage Assures representation of all groups insample population needed Characteristics of each stratum can beestimated and comparisons made Reduces variability from systematic 31. how many part-timeemployees do you have? DemeritBias selection of sample mayoccur Time consuming process 49. http://vealcine.com/sampling-error/random-error-sampling.php Clipping is a handy way to collect important slides you want to go back to later.

AdvantageDemerit More accurate Useful in specific circumstances to serve thepurpose More costly due to Advertizing Mass are left 55. Called as Accidental / IncidentalSamplingSelecting haphazardly those cases thatare easiest to obtainSample ParameterThe variable of interestStatisticThe information obtained from the sampleabout the parameter 9. Recommended Classroom Management Fundamentals Flipping the Classroom iBooks Author for Teachers: Fundamentals Sampling Errors Neeraj Kumar Errors in research Abinesh Raja M Type i and type ii errors p24ssp RESEARCH METHOD In the analysis phase, errors of incorrect editing, coding and/or descriptive summarization and inferences can contribute substantially to measurement error/DATA ANALYSIS ERROR. 5.

The population having significant variations (Heterogeneous),observation of multiple individual needed to find all possiblecharacteristics that may exist 7. This may be because the respondent is NAH (Not at Home) on the initial call (or call backups) or may have moved away from the area either permanently or for the Generated Mon, 24 Oct 2016 08:48:39 GMT by s_ac4 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection process – from the development of the instrument till the analysis of findings.

Continue to download. Disadvantage High cost; low frequency of use Requires sampling frame Does not use researchers’ expertise Larger risk of random error thanstratified 27. Facebook Twitter LinkedIn Google+ Link Public clipboards featuring this slide × No public clipboards found for this slide × Save the most important slides with Clipping Clipping is a handy Again thanks to all 3 years ago Reply Are you sure you want to Yes No Your message goes here Nosheela Nazir 1 month ago Ghulam Mohyuddin , Assistant Professor

Create a clipboard You just clipped your first slide! The necessity to accept surrogate information arises from either the inability or the unwillingness of the respondent to provide the needed information. Therefore, generalizability is neverstatistically appropriate.Non Probability Sampling 44. Non response can occur in two ways – (a) Non-Contact i.e.

Important that:- At planning stage, all potential non-sampling errors arelisted and steps taken to minimise them are considered. If data are collected from other sources, questionprocedures adopted for data collection, and OF HOME SCIENCEMAHILA MAHA VIDYALAYABHU, VARANASISAMPLING: A Scientific Method ofData Collection 2. The error can also occur at transmittal stage - when the interviewer is questioning the respondent. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.

Sampling error falls to zero in case of a census. Maximizing accuracy requires that “total error” be minimized.