Question 1140494: A research group conducted an extensive survey of 3169 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1508 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. Find a 90% confidence interval for p. (Round your answers to three decimal places.)
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! A 90% CI is phat +/-z* sqrt(p*(1-p)/n), z=1.645
phat =0.4759
so the half-interval is z* sqrt(.4759*.5241/3169)=0.00887*1.645=0.0146
the interval is (0.461, 0.491)
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