Probability and non-probability sampling techniques in sample design -
advantages and disadvantages - A review of several sampling techniques -
Determining the sample size - Sampling mistakes. Data gathering techniques
include secondary and primary procedures. -compiling and modifying data -
coding managing unacceptable answers and missing data; classification; - the
design of the questionnaire - the types of questions - recommendations for
creating questionnaires, testing questionnaires, and other techniques for
gathering data. - projective techniques - observation - Cronbach's Alpha; -
dependability and consistency; - Cronbach's goodness of fit of the data.
Selecting Designs
The likelihood of selecting any certain sample is provided by the mathematical
function known as sampling design. The study of sample design is an
important component of statistics and is often taught as a one- or two-
semester course since sampling is the basis of almost all research projects. It
entails both knowing how to build the best-fit sampling technique for a real-
life scenario and understanding how to generate the probability functions that
characterise a particular sampling method.
Methods of probability sampling
Every member of the population has a possibility of getting chosen when
sampling using probability. Mostly quantitative research uses it. Probability
sampling methods are the best option if you wish to get findings that are
inclusive of the whole population.
Four primary categories of probability samples exist.
, 1. Using a simple random sample
Every person in the population has an equal probability of getting chosen in a
basic random sampling. The whole population should be included in your
sample frame.
You might utilise instruments like random number generators or other
methods that just depend on chance to carry out this kind of sampling.
Example
100 workers of Company X should be chosen at random from a basic sample
size of 100. Every employee in the corporate database is given a number
between 1 and 1000, and 100 numbers are chosen at random.
2. Consistent sampling
Simple random sample and systematic sampling are comparable, but
systematic sampling is often a little simpler to carry out. Every person in the
population is assigned a number, but instead of assigning numbers at random,
people are picked at predetermined intervals.
Example
The company's personnel are all listed in alphabetical order. You choose
number 6 as your starting point at random from the first 10 digits. Every tenth
individual on the list is chosen starting at number 6 (6, 16, 26, 36, and so on),
creating a sample of 100 persons.
It's crucial to check the list for any hidden patterns that might bias the sample
if you employ this strategy. There is a chance that your interval could pass
over persons in junior jobs, leading to a sample that is biassed towards senior
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jithinjacobissac. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
