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April 20, 2014

April 20, 2014

Posted by **Alex** on Wednesday, May 4, 2011 at 2:52am.

Macatawa and measured the amount of sodium in parts per million. For their data,

they calculated notation bar x= 24.11 and s^2= 24.44. Find an approximate 90% confidence interval for μ , the mean of the amount of sodium in parts per million.

- Math(Probability) -
**PsyDAG**, Wednesday, May 4, 2011 at 1:59pm90% = mean ± 1.645 SEm (Standard Error of the mean)

SEm = s/√(n-1)

I'll let you do the calculations.

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