document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=134667>Question 134667</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need some help please, I've searched the website and I'm not finding this answer. NO ISBN as I'm in an online class.\r<BR>\n" );
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document.write( "Biting an un-popped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the un-popped kernels were counted. There were 86. \r<BR>\n" );
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document.write( "(a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. \r<BR>\n" );
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document.write( "(b) Check the normality assumption. \r<BR>\n" );
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document.write( "(c) Try the Very Quick Rule. Does it work well here? Why, or why not? \r<BR>\n" );
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document.write( "(d) Why might this sample not be typical?<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 #98509 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=98509\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Biting an un-popped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the un-popped kernels were counted. There were 86. <BR>\n" );
document.write( "(a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.<BR>\n" );
document.write( "p-hat = 86/773 = 0.1113<BR>\n" );
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document.write( "E = 1.96*sqrt[0.1113*0.8887/773] = 0.0221<BR>\n" );
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document.write( "CI = (0.1113-0.0221 , 0.1113+0.0221)<BR>\n" );
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document.write( "(b) Check the normality assumption.<BR>\n" );
document.write( "pn = 0.113*773 = 86+<BR>\n" );
document.write( "qn = even higher<BR>\n" );
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document.write( "(c) Try the Very Quick Rule. Does it work well here? Why, or why not? <BR>\n" );
document.write( "I don't know what the Quick Rule is.<BR>\n" );
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document.write( "(d) Why might this sample not be typical?<BR>\n" );
document.write( "The geographic distribution of kernels is enormous. The sample<BR>\n" );
document.write( "was gathered by one person in one place so it probably is not<BR>\n" );
document.write( "a simple-random-sample becasue not every kernel had an equal<BR>\n" );
document.write( "chance of being selected.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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