To help make his case to potential investors in his invention, Martin found a poll conducted by Gallup, a well-known research organization. Take some time to read the report, and then answer the questions to analyze the merits and limitations of this survey. Part A
The poll report includes a table titled, “Americans Using Cash Now Versus Five Years Ago, by Age.” The age intervals are not equal. Why do you think the Gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?

Part B
In the section describing the survey methods, the report states, “For results based on the total sample of national adults, the margin of sampling error is ±4 percentage points at the 95% confidence level.” Interpret the meaning of this statement in terms of the poll. Use any statistic given in the report as an example to explain your interpretation.

Part C
In the section describing the survey methods, the report states, “Each sample of national adults includes a minimum quota of 60% cell phone respondents and 40% landline respondents.” Do you think this is a good minimum quota for this survey? Should it be lower or higher?

Part D
The report begins by showing three bulleted highlights from the survey. At the end of the article, you can click a link to view the complete question responses and trends. Click the link and interpret the results of question 5. Use your interpretation of the statistics to write one more bullet point that could be added as a fourth bullet at the beginning of the report.