In exercises 1-5, refer to the table below which summarizes results from 641 people who responded to aUSA Todaysurvey. Participants responded to this question: "Who do you most like to get compliments from at work?"

Response

Frequency

Co-workers

260

Boss

241

Strangers

82

People who report to me

58

1.Graph Which of the following graphs would be best for visually illustrating the data in the table: histogram; dotplot; scatterplot; Paretto chart; stemplot?

2.Level of measurement: Is the level of measurement of the 641 individual responses nominal, ordinal, interval, or ratio? Why?

3.Sampling: The results in the table were obtained by posting the question on a Web site, and readers ofUSA Todaycould respond to the question if they chose to. What type of sampling called? Is this type of sample likely to be representative of the population of all workers? Why or why not?

4.Misleading graph: How is the accompanying graph misleading? How could it be modified so that it would not be misleading?

5.Statistic or Parameter? Among the 641 people who responded toUSA Todaysurvey, what is the percentage of responders who chose the category of boss? When considered in the context of the population of all workers, is that percentage a statistic or a parameter? Explain.