document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=136315>Question 136315</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The management of the corporation looking at training issues are not convinced that they should switch to toutside consultants for all of their training programs. They want to look at how the two groups compared on the pretest. The relevant data are given below. \r<BR>\n" );
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document.write( "                    Population 1           Population 2<BR>\n" );
document.write( "                    Outside Consultant     In House trainer\r<BR>\n" );
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document.write( "            Sample<BR>\n" );
document.write( "              Size            30                             40\r<BR>\n" );
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document.write( "Mean Score on Pretest          4.8                            5.2\r<BR>\n" );
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document.write( "Std. Dev. on Pretest Score     0.3                            0.4\r<BR>\n" );
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document.write( "Test to see if there is a mean difference in the pretest scores. Use Alpha 0.05<BR>\n" );
document.write( "Ho<BR>\n" );
document.write( "H1\r<BR>\n" );
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document.write( "Alpha<BR>\n" );
document.write( "CV<BR>\n" );
document.write( "What Formula? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #100072 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=100072\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The management of the corporation looking at training issues are not convinced that they should switch to toutside consultants for all of their training programs. They want to look at how the two groups compared on the pretest. The relevant data are given below. <BR>\n" );
document.write( ".............Population 1.......Population 2<BR>\n" );
document.write( ".............Outside Consultant In House trainer <BR>\n" );
document.write( "Sample<BR>\n" );
document.write( "Size............... 30.................. 40 <BR>\n" );
document.write( "Mean Pretest Scoret 4.8................. 5.2 <BR>\n" );
document.write( "StD  Pretest Score. 0.3................. 0.4 <BR>\n" );
document.write( "Test to see if there is a mean difference in the pretest scores. Use Alpha 0.05<BR>\n" );
document.write( "Ho: u1-u2 = 0<BR>\n" );
document.write( "H1: u1-u2 is not zero <BR>\n" );
document.write( "Alpha: 5%<BR>\n" );
document.write( "CV: z = +/- 1.96<BR>\n" );
document.write( "Comment: I am using z instead of t because the samples are >=30.<BR>\n" );
document.write( "What Formula?<BR>\n" );
document.write( "z(4.8-5.2) = [(4.8-5.2)-0]/sqrt[s1^2/n1 + s2^2/n2] <BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
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