SOLUTION: Some teachers from the university of Wisconsin mailed surveys to 1000 residents of a county in Wisconsin. Of those surveys, only 254 responded about a habit whose scientific name i

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Some teachers from the university of Wisconsin mailed surveys to 1000 residents of a county in Wisconsin. Of those surveys, only 254 responded about a habit whose scientific name i      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1073368: Some teachers from the university of Wisconsin mailed surveys to 1000 residents of a county in Wisconsin. Of those surveys, only 254 responded about a habit whose scientific name is rhinotillexomania, or its common name, nose- picking. The somewhat disturbing results are summarized below .
Frequency of picking Number of people
Never 22
Sometimes 110
Daily 64
2-5 times daily 55
Hourly 3
A. What is the probability that a random selected person from that county would pick their nose at least twice a day?
B. How accurate do you think these probabilities are in determining the habits of all Americans? Explain.




Hourly
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
254 people responded, so:
A.55+3/254=0.2283 or a 22.83% chance a randomly selected person picks their nose at least twice a day.
B. These results are probably not accurate in describing all Americans because the sample size is too small; and one county in Wisconsin is probably not completely representative of all Americans. ☺☺☺☺