OpenStudy (anonymous):
A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standard deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 5% of 75%. Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation.
OpenStudy (anonymous):
@dan815
OpenStudy (anonymous):
@jim_thompson5910
OpenStudy (anonymous):
can you help peachpi?
jimthompson5910 (jim_thompson5910):
Similar Question http://openstudy.com/users/jim_thompson5910#/updates/558dcb61e4b042836626b030
OpenStudy (anonymous):
do you have any clue why it asks for the confidence interval twice @jim_thompson5910
jimthompson5910 (jim_thompson5910):
what do you mean? it only asks for it once
jimthompson5910 (jim_thompson5910):
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