For fixed population standard deviation and level of significance, the minimum sample size needed to guarantee a given margin of error ......... as the margin of error increases.
increases
decreases
stays the same



Answer :

For fixed population standard deviation and level of significance, the minimum sample size needed to guarantee a given margin of error increases as the margin of error increases.

A sample size of roughly 750 is needed to get a 3 percent margin of error at a 90% level of confidence. For a degree of confidence of 95%, the sample size would be approximately 1,000. It is simple to calculate the margin of error at different confidence levels.

With a 95% level of confidence and a 5% margin of error, the best sample size for a population of 5,000 persons is 357. Our online calculator can be used to figure this out. You can also use this number as a convenient sample. It shows how many survey takers you'll need to obtain a representative sample.

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