Monday

January 26, 2015

January 26, 2015

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.

**Answer this Question**

**Related Questions**

Math - Take the greatest care with your significant digits. If you dont this ...

chemistry - New York citys 7.9 million people have a daily per capita ...

MATH/SCIENCE - Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It ...

ENVIRONMENTAL SCIENCE ( math/science) - Llyn y Gweision (a Welsh lake) has a ...

Environmental science - Llyn y Gweision (a Welsh lake) has a surface area of 10 ...

math - The amount of pollution, A (in part per million), present in the air ...

Environmental Science - Take the greatest care with your significant digits. If ...

chemistry - Calculating Parts per million Helium gas, 3.0 x 10^-4 is dissolved ...

chemistry - Dissolved Oxygen in aquatic systems is important for the survival of...

chemistry - 1. 15.0 g of sodium sulfate are dissolved in water to form 400.0 g ...