Aqualungx
  • Aqualungx
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Do you know how to solve for your error margin?
phi
  • phi
this is the same problem as your "customer service" problem, but with different numbers
anonymous
  • anonymous
So 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

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More answers

Aqualungx
  • Aqualungx
I got 82.51, 83.49
UnkleRhaukus
  • UnkleRhaukus
those aren't in the multiple choice
Aqualungx
  • Aqualungx
yes I know one second
Aqualungx
  • Aqualungx
I think it would be 83.2?
UnkleRhaukus
  • UnkleRhaukus
|dw:1433333812983:dw|
UnkleRhaukus
  • UnkleRhaukus
|dw:1433334016477:dw|
Aqualungx
  • Aqualungx
They are both equally far apart
UnkleRhaukus
  • UnkleRhaukus
nope
UnkleRhaukus
  • UnkleRhaukus
|dw:1433334121303:dw|
Aqualungx
  • Aqualungx
Am I looking for the farthest away? since it says outside the 95% confidence interval
UnkleRhaukus
  • UnkleRhaukus
i don't know how to calculate the 95% confidence interval, but yes you are looking for the option that are furthest from the mean
Aqualungx
  • Aqualungx
so 83.6
UnkleRhaukus
  • UnkleRhaukus
if 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
Aqualungx
  • Aqualungx
Okay thank you!
UnkleRhaukus
  • UnkleRhaukus
if we use @DelTaVsPi 's result :
Aqualungx
  • Aqualungx
Can you help me with one more?
UnkleRhaukus
  • UnkleRhaukus
|dw:1433334736084:dw|
UnkleRhaukus
  • UnkleRhaukus
i don't know stat.
Aqualungx
  • Aqualungx
The answer was right...
UnkleRhaukus
  • UnkleRhaukus
The answer is always right!
Aqualungx
  • Aqualungx
Lol
Aqualungx
  • Aqualungx
For 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
  • UnkleRhaukus
the first option seems to define randomization and the last two options seam to be examples of a controlled experiment
Aqualungx
  • Aqualungx
So it would be B since repeating the same experiment on different people
UnkleRhaukus
  • UnkleRhaukus
makes the most sense, if the results for the 5 studies agree; these replicated results will be much stronger evidence
Aqualungx
  • Aqualungx
I dont know why I said people xD
UnkleRhaukus
  • UnkleRhaukus
People are everywhere!

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