Question 1
Explain the difference between a statistic and a parameter. Give an example of each.Question 2
Frederick is interested in whether residents of his community are opposed to the construction of a party store on the corner of a busy intersection. He randomly polls 150 residents in the community and receives responses from 55 residents. Of those who responded, 60% were opposed to the construction of the party store in the community so Frederick concludes that the majority of residents in his community oppose the construction of the party store. Explain what is wrong with this approach.Answer 1
A statistic is a summary of a sample of data, examples will vary. A parameter is a numerical value that characterizes some aspect of the population, examples will vary.Answer 2
Frederick's survey may have nonresponse bias. The residents who chose not to participate may have different views about the survey topic then those who did respond.