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1 point Before conducting a study it is often a good idea to decide on...

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1 point Before conducting a study it is often a good idea to decide on the necessary sample size To do so statisticians often first decide on an acceptable margin of error and then work backward to the sample size Since they haven t run the study yet it is common practice to approximate sample proportion as 50 since this is the worst case scenario Recall that the standard error for a single proportion is SE p 1 p n 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 wil less than what the researchers want a If researchers decide on a 4 8 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 We need a whole number of people not fractional people so please round up

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