document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025578>Question 1025578</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Because of their sleep deprivation new parents have a hard time focusing. The average number of minutes a new parent can focus equals 3.7. The standard deviation equals 0.8. You assess how long 150 randomly selected new parents can focus and find the mean equals 3.8 minutes and the standard deviation equals 0.5. What is the 95% confidence interval? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #640845 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=640845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Because of their sleep deprivation new parents have a hard time focusing. The average number of minutes a new parent can focus equals 3.7. The standard deviation equals 0.8. You assess how long 150 randomly selected new parents can focus and find the mean equals 3.8 minutes and the standard deviation equals 0.5. What is the 95% confidence interval? <BR>\n" );
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document.write( "x-bar = 3.8<BR>\n" );
document.write( "ME = 1.96*0.5/sqrt150 = 0.08<BR>\n" );
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document.write( "95% CI:: 3.8-0.08 < u < 3.8+0.08<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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