document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=492305>Question 492305</A>: <I><SPAN STYLE=\"word-break: break-all;\"> By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.92 seconds. <BR>\n" );
document.write( "Answer each of the following (show all work):<BR>\n" );
document.write( "(A) How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 seconds? \r<BR>\n" );
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document.write( "(B) What sample size is required for a maximum error of 1.5 seconds?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #335171 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=335171\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.92 seconds. <BR>\n" );
document.write( "Answer each of the following (show all work):<BR>\n" );
document.write( "(A) How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 seconds?<BR>\n" );
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document.write( "n = [z*s/E]^2<BR>\n" );
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document.write( "n = [1.645*3.92/2]^2 <BR>\n" );
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document.write( "n = 11 when rounded up<BR>\n" );
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document.write( "(B) What sample size is required for a maximum error of 1.5 seconds?<BR>\n" );
document.write( "n = [1.645*3.92/1.5]^2 <BR>\n" );
document.write( "n = 19 when rounded up<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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