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<p><strong><span style="font-size: medium;">Plumber Salaries</span></strong></p> <p><span style="font-size: medium;">The population mean annual salary for plumbers is $46,700. A random sample of 42 plumbers is drawn from this population. What is the probability (to three significant figures) that the mean salary of the sample is less than $44,000? Assume «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»§#963;«/mi»«mo»=«/mo»«/math»$5600.</span></p> <p><span style="font-size: medium;">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»P«/mi»«mfenced»«mrow»«mover»«mi»x«/mi»«mo»§#175;«/mo»«/mover»«mo»§lt;«/mo»«mo»$«/mo»«mn»44«/mn»«mo»,«/mo»«mn»000«/mn»«/mrow»«/mfenced»«mo»=«/mo»«/math» {1:NM:=0.000890:0.000001}<br /></span></p>
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Tuesday, 5 November 2013, 10:15 AM
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