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anonymous
 one year ago
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 6% of 80%.
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.
anonymous
 one year ago
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 6% of 80%. 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.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you mention someone for me please

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2the key phrase here is `nine times out of ten` which points us to a 90% confidence interval

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.290% of the confidence intervals generated will have the population parameter we're interested in

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So what would be the margin error

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2`seniors will have an average score within 6% of 80%` the target is 80%. Basically this is the stated population parameter the 6% is the error from the target. You can go 6% too high, or 6% too low

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2dw:1440113642475:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2dw:1440113668269:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So basically I was already given the answers within the question.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2they just wanted you to interpret it a different way

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok thank you, so that is it?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2yeah there's one more part, but I'm sure you see what the confidence interval is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what does the confidence interval mean? Sorry if I am bothering you

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2it means that we're 90% confident that the true mean is between 74% and 86% the true mean is usually at the center of the confidence interval
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