Suppose that a corporation official wants to conduct a  survey in  to estimate, with 95% confidence, a support for the premier’s strategies on  economy within 3% error. If the official has initial estimate that 70% of the people in town support the economic strategies of the premier. How many people should she  survey?

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Suppose that a corporation official wants to conduct a 
survey in  to estimate, with 95% confidence, a support for the premier’s strategies on 
economy within 3% error. If the official has initial estimate that 70% of the people in town
support the economic strategies of the premier. How many people should she  survey? 

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Step 1

Here,
A corporation official wants to conduct a 
survey in  to estimate, with 95% confidence. 
i.e α=0.05

the premier’s strategies on economy within 3% error,
i.e E=0.03

the official has initial estimate that 70% of the people in town
support the economic strategies of the premier.
i.e p^=0.7

We have to find, How many people should she  survey, i.e  we have to find n

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