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bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
A study to assess the attitudes of accountants toward advertising their services involved sending questionnaires to 200 accountants selected from a list of 1400 names. A total of 82 usable questionnaires were returned. The data summary for one question is shown in the accompanying table.

a. Estimate the population proportion virtually certain to advertise in the future.
b. Estimate the population proportion having at least a 50–50 chance of advertising in the future.
c. Among those who advertised in the past, estimate the population proportion somewhat unlikely to advertise again.
d. Among those who advertised in the past, estimate the population proportion having at least a 50–50 chance of advertising again.
Place bounds on the errors of estimation in all cases. Do parts (c) and (d) require further assumptions over those made for parts (a) and (b)?
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