IE 361 Exam 2 F2011

IE 361 Exam 2 F2011 - IE 361 Exam 2 Fall 2011 I have...

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1 IE 361 Exam 2 Fall 2011 I have neither given nor received unauthorized assistance on this exam. ________________________________________________________ Name Date There are 12 questions here, each worth 10 points. Answer at least 10 of them. I will count your best 10 scores.
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2 1. Thicknesses of 6 n = sheets of wallboard before and after drying during manufacture, corresponding differences, and some summary statistics are below. (Units are inches.) Use these data in what follows. Sheet Before ( x ) After ( y ) Difference ( d ) 1 .514 .510 .004 2 .505 .502 .003 3 .500 .493 .007 4 .490 .486 .004 5 .503 .497 .006 6 .500 .494 .006 mean .5020 .4970 .0050 std dev .0078 .0082 .0015 a) What 6 ordered pairs would be plotted on ordinary graph paper to make a normal plot for the "Before" data? (List the 6 numerical ordered pairs.) b) Give two-sided limits that you are "95% sure" bracket the next reduction-in-thickness-by-drying of one of these sheets made on the day of data collection. (Plug in completely, but you don't need to simplify.) 10 pts 10 pts
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3 c) Give 99% two-sided limits for 95% of the "After" thicknesses of these sheets of wallboard on the day of data collection. (Plug in completely, but you don't need to simplify.) d) If specifications on the "After" thickness of these sheets are .5 .01 ± inch, give 95% confidence limits for a measure of process capability that quantifies potential (as opposed to current performance). (Plug in completely, but you don't need to simplify.) 10 pts 10 pts
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IE 361 Exam 2 F2011 - IE 361 Exam 2 Fall 2011 I have...

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