document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1134222>Question 1134222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question No. 7<BR>\n" );
document.write( "A study conducted among 29-year-old male, acetone levels were normally distributed with a mean of 1070 and a standard deviation of 311 ppb. Find the probability that on a given day the subject’s acetone level is:<BR>\n" );
document.write( "a.	Between 700 and 1100 ppb<BR>\n" );
document.write( "b.	Over 1000 ppb<BR>\n" );
document.write( "c.	Under 600 ppb<BR>\n" );
document.write( "d.	Between 1000 and 1200 ppb<BR>\n" );
document.write( "Question No. 8<BR>\n" );
document.write( "The weights of a certain population of young adult females are approximately normally distributed with a mean of 231 pounds and a standard deviation of 21. Find the probability that a subject selected at random from this population will weigh:<BR>\n" );
document.write( "a.	More than 175 pounds <BR>\n" );
document.write( "b.	121 pounds or less<BR>\n" );
document.write( "c.	Between 115 and 155 pounds\r<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 #751524 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=751524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "z is between -370/311 or -1.19 and 30/311, or 0.10 and probability is 0.4228\r<BR>\n" );
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document.write( "over 1000 has z of -70/311 or -0.225 and probability is 0.5890\r<BR>\n" );
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document.write( "under 600 has z of -470/311 or -1.51 and probability of 0.0655\r<BR>\n" );
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document.write( "between 1000 and 1200 has z of -0.225 and 130/311 or +0.42 and probability of 0.2518\r<BR>\n" );
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document.write( "same approach<BR>\n" );
document.write( "z>(175-231)/21 or z>-2.67 probability of 0.9962<BR>\n" );
document.write( "121 or fewer is probability of 0 by inspection.  It is more than 5 sd s below the mean.<BR>\n" );
document.write( "between 115 and 155 is essentially fewer than 155 or z <- 76/21 (-3.62)  probability is 0.00015 </SPAN>\n" );
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