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You plan to conduct a survey to find what proportion of the workforce has two or...

You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 99% confidence level and a margin of error of 2%. A pilot survey reveals that 8 of the 47 sampled hold two or more jobs. (Use z Distribution Table.)

How many in the workforce should be interviewed to meet your requirements? (Round z-score to 2 decimal places. Round up your answer to the next whole number.)

Math   Statistics-And-Probability   
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Answer #1

We have given,                  
Preliminary estimate for proportion (Known) = 8/47=0.1702
Margin of error =E=0.02
Level of significance =1-0.99=0.01
Z critical value is (by using Z table) =2.576
Sample size formula is                   


=2342.96      
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