document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=285878>Question 285878</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A gas station manager thinks the average motorist changes their oil less than the recommended two times per year.  In a survey 15 car owners were asked how many times they changed their oil in the past year.  Here are the results:\r<BR>\n" );
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document.write( "1    1    2    1    2<BR>\n" );
document.write( "2    0    1    0    1<BR>\n" );
document.write( "2    3    1    3    0\r<BR>\n" );
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document.write( "The value of the test statistic is equal to _____________ ? <BR>\n" );
document.write( "Answer between two and four decimals\r<BR>\n" );
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document.write( "Thank you for any help that you can provide! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #207299 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=207299\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A gas station manager thinks the average motorist changes their oil less than the recommended two times per year. In a survey 15 car owners were asked how many times they changed their oil in the past year. Here are the results: <BR>\n" );
document.write( "1 1 2 1 2<BR>\n" );
document.write( "2 0 1 0 1<BR>\n" );
document.write( "2 3 1 3 0<BR>\n" );
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document.write( "sample mean = (sum of the data)/15 = 20/15 = 4/3<BR>\n" );
document.write( "sample standard deviation: 0.976<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "test statistic = t(4/3) = (4/3 - 2)/[0.976/sqrt(15)] = -0.0882<BR>\n" );
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document.write( "The value of the test statistic is equal to -0.0882 <BR>\n" );
document.write( "Answer between two and four decimals<BR>\n" );
document.write( "===========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
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