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If the Mean equals 100 variance equals 40 and sample size equals 10 what is the standard deviation?
6.3
If the size of a sample equals to the size of the population?
Sample is subset of the population so sample size and population size is different.However, as a subset can be the whole set, if the sample size equals the population size, you have sampled the entire population and you will be 100% accurate with your results; it may cost much more than surveying a [representative] sample, but you get the satisfaction of knowing for what you surveyed the population exactly.Using a sample is a trade off between the cost of surveying the whole population and accuracy of the result.A census is a survey of the whole population and could be considered that the sample size = population size; in this case the results are 100% accurate.The television viewing figures are calculated using a sample of the whole population and then extrapolating them to the whole population; depending upon how the same was chosen, including its size, will affect the accuracy of the results - most likely not more than 95% accurate.With a carefully selected (that is properly biased) sample you can prove almost anything!
What is absolute sample size?
It is the number of elements in the sample. By contrast, the relative sample size is the absolute sample size divided by the population size.
What is proportions test?
Many researchers use a proportions test to verify the statistically significant difference between two independent proportions. This test has a number of requirements such as the use of random sampling, samples must be independent, at least 10 successes and 10 failures, and the population is at least 10 times the size of the sample.
What is the difference between sample and sample size?
a sample is a sample sized piece given... a sample size is the amount given in one sample
