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anonymous
 one year ago
Suppose that a travel bureau claims that the trees in a forest are 83 feet tall on average, with a standard deviation of 2 feet. If you took a sample of 64 trees, which of the following mean heights would be outside the 95% confidence interval?
A. 83.2 feet
B. 83.4 feet
C. 82.8 feet
D. 83.6 feet
anonymous
 one year ago
Suppose that a travel bureau claims that the trees in a forest are 83 feet tall on average, with a standard deviation of 2 feet. If you took a sample of 64 trees, which of the following mean heights would be outside the 95% confidence interval? A. 83.2 feet B. 83.4 feet C. 82.8 feet D. 83.6 feet

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do you know how to solve for your error margin?

phi
 one year ago
Best ResponseYou've already chosen the best response.0this is the same problem as your "customer service" problem, but with different numbers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So given: That the the sample mean is 83 The error margin is 1.96^2 / Squa*64 > Which gives = 0.49 Approximately Now the range is from 83  0.49 < u < 83 + 0.49

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1those aren't in the multiple choice

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes I know one second

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think it would be 83.2?

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433333812983:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433334016477:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0They are both equally far apart

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433334121303:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Am I looking for the farthest away? since it says outside the 95% confidence interval

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1i don't know how to calculate the 95% confidence interval, but yes you are looking for the option that are furthest from the mean

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1if any of the options are correct yes that must be one of them, but if there are multiple correct options i cant be sure about 82.8 and 83.4, either they are both correct also or both incorrect

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1if we use @DelTaVsPi 's result :

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you help me with one more?

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433334736084:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1i don't know stat.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The answer was right...

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1The answer is always right!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0For the second question if you can help its which of the following is an example of replication A. Assigning test subjects to test groups arbitrarily B. performing five different studies of the same drug C. testing patients by giving them either a new drug or no drug D. studying the effects of both therapy and no therapy on students

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1the first option seems to define randomization and the last two options seam to be examples of a controlled experiment

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So it would be B since repeating the same experiment on different people

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1makes the most sense, if the results for the 5 studies agree; these replicated results will be much stronger evidence

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I dont know why I said people xD

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.1People are everywhere!
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