statistics word problem - StudentOfFortune.com

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wonder8
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$3.00 statistics word problem

From Mathematics: Statistics
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Due on Nov. 09, 2009
Asked on Nov. 06, 2009 at 12:46:37AM

Q:

The air pollution index (from 1 to 25, with 25 being the highest pollution) takes into account the amount of carbon monoxide in the air. A random sample of 38 readings taken 1 hour before sunset had a sample mean index reading of 9.2. Assume the population standard deviation is 2.3. Find a 90% confidence interval for the population mean index reading.

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Posted by:

StatisticsSolver
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$3.00 Here is your solution wonder8 !! complete work shown !!

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Posted on Nov. 06, 2009 at 12:55:56AM

A:
Preview: ... tachment ...

The full tutorial is about 6 words long plus attachments.

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The air pollution index.doc (48K) (Preview)

Posted by:

jam007
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$3.00 Air polution confidence interval

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Posted on Nov. 06, 2009 at 01:21:47AM

A:
Preview: ... . if you need ...

The full tutorial is about 12 words long plus attachments.

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The air pollution index.docx (12K) (Preview)
The air pollution index.doc (50K) (Preview)

Posted by:

sudipta

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$2.00 Correct steps shown

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Posted on Nov 06, 2009 at 5:16:49PM

A:
Preview: ... (Mean - 1.65 x SD/√Sample size, Mean + 1.65 x ...

The full tutorial is about 44 words long .