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You select a random sample of 110 people at a medical convention attended by 1 comma...

You select a random sample of 110 people at a medical convention attended by 1 comma 657 people. Within your​ sample, you find that 75 people have traveled from abroad. Based on this sample​ statistic, estimate how many people at the convention traveled from abroad. Would you be more confident of your estimate if you sampled 300​ people?

Math   Statistics-And-Probability   
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Answer #1

Total number of people at the convention = 1657

Sample size = 110

Number of people travelled from abroad = 75

Proportion of people travelled from abroad based on sample = Number of people travelled from abroad /Sample size = 75/110 = 0.6818

Number of people travelled from abroad at the convention = Proportion of people travelled from abroad based on sample*Total number of people at the convention = 0.6818*1657 = 1130

Yes, the sample of 300 would have give more precise answer as the sample size increase the precision increase.

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