Question

State the type of sampling method used in each of the following situations.

a.________________________. To maintain quality control in a chicken processing plant, every 20th chicken coming off the production line was tested for bacteria

b.________________________.To conduct a study on staph infections rates among those hospitalized, all of the patients in three randomly selected hospitals were followed.

c.________________________. To judge the appeal of a proposed neighborhood restaurant, all adults living within 5 miles of the proposed location were split into lists of one person, two people, or more than two people per household.Twenty-five names were randomly chosen from each list and those chosen were asked to rate the menu in comparison to other local eateries.

d._______________________. All subscribers to a newspaper were assigned customer numbers.Then a sample of 30 customers was selected by using a random-number table.The customers in the sample were asked to rate a proposed new lay-out for the paper.

3.Voluntary Response Sampling and Convenience Sampling lead to which type of bias:

a. Undercoverageb. Non-Representativec. Responsed. Non-Response

4. A large metropolitan area wished to conduct a survey to study attitudes about recycling.

Name the possible bias and explain why you choose this bias:

a. The person conducting the survey was wearing a t-shirt with "Fight Global Warming" on

the front.This person watches the participants fill out the surveys.

b. The survey was only given at one local farmer's market