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July 23, 2014

July 23, 2014

Posted by **James** on Monday, July 9, 2012 at 11:50am.

I did the work and got ($ 1079.48, $ 1320.50 ) but it says that this answer is wrong.

- Stats -
**MathGuru**, Monday, July 9, 2012 at 3:13pmCI95 = mean ± 1.96 (sd/√n)

With your data:

CI95 = 1200 ± 1.96 (230/√14)

Calculating...

1200 + 120.48 = 1320.48

1200 - 120.48 = 1079.52

I found approximately the same answer you did.

- Stats -
**James**, Monday, July 9, 2012 at 4:25pmThank you!

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