Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Determining Sample Size for estimatingMeans
a.Acceptable Errors: There may be several errors in the sample size. The researcher will have to decide those errors. Which may be acceptable to the executive. For example if the marketing executive desires to spends Rs.10,000 per month on advertisement he may willingly spend ± 10 % of the said expenditure. The deviation is decided on the basis of the acceptable mean of ten expenditure. A large size error would be unacceptable. Therefore ten management will have to determine various errors related to the sampling procedures. How many errors will be acceptable to management are decided before planning the sampling.
b.Confidence Level :The next factor influencing the sample size is deciding the confidence level. The larger the size of the sample the larger will be the confidence level of the estimate. In case of a 100 percent sample of the population the confidence of the estimate will be a 100 percent accurate. But the study of all elements of the population will too costly and impractical. Therefore a smaller size sample is selected for calculating the estimate. In practice the management may decide on a 90 percent 95 percent or 99 percent confidence level. Ac confidence level of 95 percent is desirable for all purposes. The remaining 5 percent risk is acceptable. Depending on a 95 percent confidence level, the size of he sample may be determined. In case of the estimate size of sample is decided by the followings formula.
x = s/ √n
Where x is the estimate of the standard error of the man and S is the sample standard deviation and is the size of he sample. We have seen that ± 2 x as the interval at 95.45 confidence level to decide a specific estimate. If we assume that we want ± 10 % of the estimate the would be :
But in practice, the standard deviation of the sample is unknown before selection of the sample. If is a typical case. The researcher tries to known from past studies.
what are the different types
CONCEPT AND NEED FOR INFORMATION: We shall look at the meaning, of information as also the meaning of other related words such as data, facts, intelligence, advice, knowledge
Name the feature which is not normally associated with a Non-Governmental Organisation (NGO)? Government funded is the organisation.
meaning of operational research?
Need Proposals are written for various reasons. They are prepared for different reasons which vary to the extent of details expected, but like research reports, the proposal a
Methods is a tool or a techniques used to collect data. It is procedure for obtaining knowledge based on empirical observation and logical reasoning. Field Study Metho
INFORMATION RESOURCES - SELECTION PRINCIPLES: Selection of materials for a library requires sagacity, adroitness and attention to people's needs for everything from books and
what happen if line balancing does not exist
Maximize Z= 3x1 + 2X2 Subject to the constraints: X1+ X2 = 4 X1 - X2 = 2 X1, X2 = 0 on..
Regression line drawn as Y=C+1075x, when x was 2, and y was 239, given that y intercept was 11. calculate the residual
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd