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!
Sampling
A Population is a collection of all the data points being studied. For example, if we are studying the annual incomes of all the people in India, then the population under study would consist of data points representing the incomes of each and every person in India.
A Sample is a part of a population.
In the above example the following would be some possible samples:
The annual incomes of all the people in Mumbai.
The annual incomes of all the people in India over forty years of age.
Your own annual income (assuming you are in India).
The annual incomes of the first hundred people mentioned in your telephone directory.
Samples, being smaller in size than their population, are easier to study. Hence, if we want to draw some conclusions about a population, we can do so by studying a suitable sample of the population.
Example
In which of the following cases do the samples appear to be suitable for arriving at conclusions about the corresponding populations?
1.
Population
:
Annual income of every person in India.
Sample
Annual income of randomly selected persons in Mumbai.
Answer
Not a representative sample because it is Mumbai.
2.
Likely customers for an exclusive credit card scheme.
Regular commuters on public transport buses.
May not be a representative sample because regular commuters on public transport buses may not be in the income range high enough to support an exclusive credit card holding.
The following notations are used to denote population parameters and sample statistics.
Characteristic
Parameter
Statistic
Size
Mean
Standard Deviation
Proportion
N
μ
σ
p
n
S
Regression line drawn as Y=C+1075x, when x was 2, and y was 239, given that y intercept was 11. calculate the residual
a. How can break-even analysis be used in selecting a new plant site? b. What are potential advantages and disadvantage of locating a production facility in foreign country i
ogives graph
Origin and Development of probability Theory: The credit for origin and development of probability goes to the European gamblers of 17 th century. They used to gamble on gam
Perform clustering of the unlabeled data set. You could use provided initial centroids set or generate your own. Also there could be considered next stopping criteria : - maxim
what is the use of applied statistic in our daily routin life
Explain what central tendency and variability are. In your answer define what the mean, median, mode, variance, and standard deviation are. What is the difference between the descr
Motion Picture Industry (95 Points) The motion picture industry is a competitive business. More than 50 studios produce a total of 300 to 400 new motion pictures each year, and t
The Quality Manager of a battery manufacturing plant reviewed the warranty records within his department and found that 4% of the low maintenance batteries produced at the plant ov
The Maju Supermarket stocks Munchies Cereal. Demand for Munchies is 4,000 boxes per year and the super market is open throughout the year. Each box costs $4 and it costs the store
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