(a) If researchers decide on a 4.2% margin of error for a 95% confidence interval. What sample size should they pursue? (b) If researchers decide on a 2.8% margin of error for a 99% confidence interval. What sample size should they pursue? Hint: Whole number of people, not fractional people. Roundup.
Before conducting a study it is often a good idea to decide on the necessary
Note: The calculation to find the sample size will likely give a decimal answer so be sure to round appropriately so that the actual margin of error will be less than what the researchers want.
(a) If researchers decide on a 4.2% margin of error for a 95% confidence interval. What sample size should they pursue?
(b) If researchers decide on a 2.8% margin of error for a 99% confidence interval. What sample size should they pursue?
Hint: Whole number of people, not fractional people. Roundup.
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