Directions: Draw the normal curve and shade in the specific region. Show formulas used and the substitution.   A member of the state legislature wants to determine what fraction of the voters in his district that favors a proposal refunding excess state sales tax revenue to the taxpayers. A random sample of 150 voters in his district shows 80 in his favor in favor. Let p be the population proportion.   A. What is the margin of error (E) for this estimate with 95 confidence    B.what sample size does he needs in order to state with 97% confidence that the sample is within .05

Question

Directions: Draw the normal curve and shade in the specific region. Show formulas used and the substitution.

 

A member of the state legislature wants to determine what fraction of the voters in his district that favors a proposal refunding excess state sales tax revenue to the taxpayers. A random sample of 150 voters in his district shows 80 in his favor in favor. Let p be the population proportion.

 

A. What is the margin of error (E) for this estimate with 95 confidence 

 

B.what sample size does he needs in order to state with 97% confidence that the sample is within .05

 

 

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