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Answer:
Sample size shouldbe atleast 60
Step-by-step explanation:
Given that PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inherited and depends on a single gene that codes for a taste receptor on the tongue. Interestingly, though the PTC molecule is not found in nature, the ability to taste it correlates strongly with the ability to taste other naturally occurring bitter substances, many of which are toxins.
Proportion of Italians who taste PTC =0.75
Margin of error <0.11
Confidence level = 95%
Std error of proportion =
Margin of error = <0.11
Sample size shouldbe atleast 60