document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198430>Question 1198430</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks this percentage has changed since then. A survey of 110 college students reported that 91 of them work. Is there evidence to support the reasearcher's claim at the 1% significance level? A normal probability plot indicates that the population is normally distributed.\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 #832092 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=832092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ho: p = .71<BR>\n" );
document.write( "Ha: p > .71 researches claim<BR>\n" );
document.write( "n = 110  (n>30, use z-test)<BR>\n" );
document.write( "x̄ = 91/110 = .827 rounded<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=blue+%28.827+-+.71%29%2Fsqrt%28blue%28.71%28.29%29%2F110%29%29 ALIGN=MIDDLE  ALT=\"z+=blue+%28.827+-+.71%29%2Fsqrt%28blue%28.71%28.29%29%2F110%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2.7<BR>\n" );
document.write( "p(z > 2.7) = .0035<BR>\n" );
document.write( " .0035 < .01 , reject Ho. The Evidence supports the researches claim.  </SPAN>\n" );
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