document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480274>Question 480274</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A psychologist believes that the kind of feedback a person receives about their work affects the quality of the work. You randomly assign 12 widget makers to one of three groups: positive feedback only, corrective feedback only, and no feedback. You track the number of widgets that each person makes correctly (out of 10) and obtain the following data:\r<BR>\n" );
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document.write( "Positive Feedback Only Corrective Feedback Only No Feedback <BR>\n" );
document.write( "5 4 5 <BR>\n" );
document.write( "4 5 4 <BR>\n" );
document.write( "4 3 6 <BR>\n" );
document.write( "7 6 2 \r<BR>\n" );
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document.write( "Use an analysis of variance (&#945; = 0.05) to determine whether this data is sufficient to conclude that there are significant differences between feedback conditions.\r<BR>\n" );
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document.write( "Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclusion, including calculation of test statistic.\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 #328940 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=328940\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A psychologist believes that the kind of feedback a person receives about their work affects the quality of the work. You randomly assign 12 widget makers to one of three groups: positive feedback only, corrective feedback only, and no feedback. You track the number of widgets that each person makes correctly (out of 10) and obtain the following data: <BR>\n" );
document.write( "Positive Feedback Only Corrective Feedback Only No Feedback <BR>\n" );
document.write( "5 4 5 <BR>\n" );
document.write( "4 5 4 <BR>\n" );
document.write( "4 3 6 <BR>\n" );
document.write( "7 6 2 <BR>\n" );
document.write( "Use an analysis of variance (&#945; = 0.05) to determine whether this data is sufficient to conclude that there are significant differences between feedback conditions. <BR>\n" );
document.write( "Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclusion, including calculation of test statistic. <BR>\n" );
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document.write( "Ho: u1 = u2 = u3<BR>\n" );
document.write( "H1: At least one of the means is different<BR>\n" );
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document.write( "I ran an AVOVA program and got the following:<BR>\n" );
document.write( "test statistic: F = 0.2658<BR>\n" );
document.write( "p-value = 0.7724<BR>\n" );
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document.write( "Conclusion: Since the p-value is greater than 5%<BR>\n" );
document.write( "fail to reject Ho.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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