In Exercise 4, how many voters should the aide sample if the congressman wanted to estimate the true level of support to within 1% using a 95% confidence interval?
Exercise 4
A local congressman indicated that he would support the building of a new dam on the Yahoo River if more than 60% of his constituents supported the dam. His legislative aide sampled 225 registered voters in his district and found 148 favored the dam. At the level of significance of 0.10 should the congressman support the building of the dam?
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