As reported by the Pew Researc

As reported by the Pew Research Center’s Social and Demographic Trends Project in September 2012, a survey of 6500 American households revealed that a record 19% owed student loan debt in 2010 (a sharp increase from the 15% that owed such debt in 2007).

a. Calculate and interpret a 95% CI for the proportion of all American households in 2010 that owed student loan debt.

b. What sample size is required if the desired width of the 95% CI is to be at most .04, irrespective of the sample results?

c. Does the upper limit of the interval in part (a) specify a 95% upper confidence bound for the proportion being estimated? Explain.

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