A survey firm is interested in dertermining the percentage of all Onslow County residents who own dogs. A surveyor stands outside PetSmart at 10am at Monday morning and asks shoppers as they pass by, "Do you own a dog?" The surveyor collects responses from the first 90 people. a. Define the population of this survey b. Define the sample.  c. What sampling method was used? (Stratified, simple random, cluster, systematic, convenience) d. Would this survey be biased? Explain your reasoning and indicate who is overrepresentated and who is underrespresentated.

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A:

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A:

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A: It is an important part of statistics. It is widely used.

Q: Q.No.3. Explain the advantage of mutiple sampling plan over single or double sampling. Answer:

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