document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=230204>Question 230204</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 216 days. After a revised mix has been developed, a sample of nine boxes of cake mix gave these shelf lives (in days): 215, 217, 218, 219, 216, 217, 218 and 218, At the 0.025 level, has the shelf live of the cake mix increased? <BR>\n" );
document.write( "A. Yes, because computed t is greater than the critical value. <BR>\n" );
document.write( "B. Yes, because computed t is lss than the critical value. <BR>\n" );
document.write( "C. No, because computed t lies in the region of acceptance. <BR>\n" );
document.write( "D. No, because 217.24 is quite close to 216. </SPAN>\n" );
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document.write( "I ran a Ttest on a TI calculator and got the following results:<BR>\n" );
document.write( "test statistic: t = 2.7584<BR>\n" );
document.write( "p-value = 0.0141<BR>\n" );
document.write( "Since the p-value is less that 2.5%, reject Ho.<BR>\n" );
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document.write( "Ans: A<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( "A. Yes, because computed t is greater than the critical value. <BR>\n" );
document.write( "B. Yes, because computed t is less than the critical value. <BR>\n" );
document.write( "C. No, because computed t lies in the region of acceptance. <BR>\n" );
document.write( "D. No, because 217.24 is quite close to 216.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );