Question: Refer to Exercise 9.2.9. Suppose a study is being planned for a part of the world for which the percentage of tasters is completely unknown,

Refer to Exercise 9.2.9. Suppose a study is being planned for a part of the world for which the percentage of tasters is completely unknown, so the 70% figure used in Exercise 9.2.9 is not applicable. What sample size is needed so that the standard error will be no larger than 0.01?
Exercise 9.2.9
The ability to taste the compound phenylthiocarbamide (PTC) is a genetically controlled trait in humans. In Europe and Asia, about 70% of people are "tasters."12 Suppose a study is being planned to estimate the relative frequency of tasters in a certain Asian population, and it is desired that the standard error of the estimated relative frequency should be 0.01. How many people should be included in the study?

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