document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198359>Question 1198359</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Consider a study conducted to evaluate the effectiveness of a new treatment to stop smoking. Before the study, it was known that the average time to quit was 2.3 months, with a standard deviation of 1.1. Using a sample of 50 adults on the new treatment, the sample average time was 1.9 months. <BR>\n" );
document.write( "The p-value for the test value should be one of the following. Which one?\r<BR>\n" );
document.write( "\n" );
document.write( "A) 0.0038<BR>\n" );
document.write( "B) 0.3594<BR>\n" );
document.write( "C) 0.9962<BR>\n" );
document.write( "D) 0.6406 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #831958 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=831958\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Depends on the Confidence Level<BR>\n" );
document.write( "and whether using one or two tailed<BR>\n" );
document.write( "Using α = 0.05 and one tailed\r<BR>\n" );
document.write( "\n" );
document.write( "t-value = -2.5713   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=blue%28-.4%29%2Fblue%281.1%2Fsqrt%2850%29%29 ALIGN=MIDDLE  ALT=\"t+=blue%28-.4%29%2Fblue%281.1%2Fsqrt%2850%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >    <BR>\n" );
document.write( "p-value = .0132<BR>\n" );
document.write( ".0132 < .05, reject Ho<BR>\n" );
document.write( "________<BR>\n" );
document.write( "with two tailed:<BR>\n" );
document.write( "Ho:  mean = 2.3<BR>\n" );
document.write( "Ha:  mean  ≠ 2.3<BR>\n" );
document.write( "p = .0066 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );