46 PM Tue Dec 13 ... 58% webassign.net A Viewing Saved Work Revert to Last Response 4. [-/4 Points] DETAILS MY NOTES ASK YOUR TEACHER Typographic errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but incorrect word. Spellchecking software will catch nonword errors but not word errors. Suppose human proofreaders catch 71.5% of nonword errors. You ask a fellow student to proofread an essay in which you have deliberately made 27 nonword errors. (a) What is the mean number of errors caught?( Keep 1 decimal place) =1 (b) What is the standard deviation o of the number of errors caught? (keep 2 decimal places) 5. [-/7 Points] DETAILS MY NOTES ASK YOUR TEACHER The National Center for Health Statistics estimates that 16.9 percent of U.S. children and adolescents aged 2 to 19 were obese in 2009-2010. Assume that this obesity rate holds true today. If you were to randomly select 12 U.S. children or adolescents, find each of the following: Note1: carry at least 6 digit precision for any intermediate calculations then round your answer to 4 decimal places Note2: Any value that is less than 0.0001, (1 x 10-4) , can be rounded to 0 A) The probability that at most 2 people are obese is:( B) The probability that exactly 4 people are obese is: C) The probability that none of the people are obese is: D) The probability that at least 2 people in the sample will be obese is: 6. [-/10 Points] DETAILS MY NOTES ASK YOUR TEACHER2:46 PM Tue Dec 13 .. . webassign.net TYPE II ERROR 7. [-/7 Points] DETAILS MY NOTES ASK YOUR T A survey of 910 patients taking the medication Obecalp showed that 200 of the patients experience side effects. a) Calculate p : (2 decimal places) b) Calculate a 95% confidence interval for p, the population proportion of patients experiencing side effects. The confidence interval lower limit is % and the upper limit is % (1 decimal place) c) The margin of error for the above confidence interval is | % (1 decimal place) d) Calculate a 99% confidence interval for p. The confidence interval lower limit is % and the upper limit is % (1 decimal place) e) In general, increasing the confidence level has what type of effect on the confidence interval? O the interval with higher confidence is wider (margin of error is larger) the interval with higher confidence is narrower (margin or error is smaller) 8. [-/16 Points] DETAILS MY NOTES ASK YOUR A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past studies of this population standard deviation is known to be 8,000. A survey of owners of that tire design is conducted. Of the 26 tires surveyed, the mean 45,700 miles . Using alpha = 0.05, is the data highly consistent with the claim