On June 4-24, 2007, the Gallup Poll asked a nationwide sample of adult Americans about their attitude toward interracial marriage. Of the 2388 adults interviewed, $77 \%$ said that they approve of marriage between whites and blacks.
a. Is this number $(77 \%)$ a parameter or a statistic? Explain briefly.
b. What kind of graph would be appropriate for displaying the results of this survey - a dotplot or a bar graph? Explain briefly. (Do not create the graph.)
c. Identify the sample size in this survey.
d. How would you respond to a person who argued that this sample cannot possibly be representative of the population of all American adults, because there are more than 200 million American adults but fewer than 3000 in this sample?

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The Answer of On June 4-24, 2007, the Gallup Poll asked a nationwide sample of adult Americans about their attitude toward interracial marriage. Of the 2388 adults interviewed, $77 \%$ said that they approve of marriage between whites and blacks.
a. Is this number $(77 \%)$ a parameter or a statistic? Explain briefly.
b. What kind of graph would be appropriate for displaying the results of this survey - a dotplot or a bar graph? Explain briefly. (Do not create the graph.)
c. Identify the sample size in this survey.
d. How would you respond to a person who argued that this sample cannot possibly be representative of the population of all American adults, because there are more than 200 million American adults but fewer than 3000 in this sample?

On June 4-24, 2007, the Gallup Poll Asked a Nationwide 77%77 \%77%

On June 4-24, 2007, the Gallup Poll Asked a Nationwide $77 \%$