International Communications Research (ICR) conducted the 2004 National Spring Cleaning Survey for The Soap and Detergent Association. ICR questioned 1000 American male and female heads of household regarding their house cleaning attitudes. The survey has a margin of error of plus or minus 5%.
THOSE HARD TO CLEAN PLACES
Cleaning windows is rated the most difficult household task
by more than one-third of adults.
Behind the TV 24%
Don't know 8%
Tops of shelves 16%
Under couch 12%
Venetian blinds 35%
Wooden floors 5%
(a) What is the population?
the 1000 American male and female heads of household
hardest household place to clean 
number of hours per week spent cleaning
which places heads of household clean first
all American heads of household

(b) How many people were polled?
people
(c) What information was obtained from each person?
hardest household place to clean
number of hours per week spent cleaning 
which places heads of household clean first

(d) Using the information given, estimate the number of surveyed adults who think cleaning under the couch is the most difficult cleaning job.
surveyed adults
(e) What do you think the "margin of error of plus or minus 5%" means?
actual percentage could be 2.5% lower or 2.5% higher than quoted
estimated percentage could be 5% lower or 5% higher than quoted 
estimated percentage could be 2.5% lower or 2.5% higher than quoted
actual percentage could be 5% lower or 5% higher than quoted