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The optimal sample size is determined using statistical formulas that balance the desired margin of error (the degree to which the sample's estimate can differ from the true population value) and the confidence level (the likelihood that the sample's results reflect the population's characteristics). These calculations ensure that the sample size is large enough to be statistically significant, but not unnecessarily large, which could waste resources. Factors such as the population size, variability within the population, and the desired precision of the results all play a role in determining the sample size. Why Other Options Are Incorrect: • A: Convenience-based sampling can introduce bias and does not ensure a representative sample. • C: Trial and error is an inefficient approach and does not guarantee statistical significance. • D: Collecting an unnecessarily large sample may increase costs and time without improving accuracy. • E: A fixed percentage of the population is not an appropriate method for determining sample size. The size must be calculated based on statistical principles.
The major maize producing districts in Rajasthan are -
Which earthquake measuring scale is based on Earth's rigidity and the amount and area of slip on the fault?
Which of the following is not correctly matched?
Norman Borlaug was given Nobel Prize in which field?
Which of the following pairs of State and formation year is/are correct?
I. Nagaland - 1972
II. Uttarakhand - 2000
III. Arunachal Pradesh - 1987
A. his subjects wisely
B. was a very kind and generous
C. king who looked after
D. everyone said that he
Where has the Constitution Park been inaugurated in Rajasthan by President Draupadi Murmu?
Which blood cells are called 'Soldiers' of the body?
What is the range of the intensity scale used in measuring earthquakes?