QBA Homework #5.docx

# QBA Homework #5.docx - Homework#5 Question 1 Does it...

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Homework #5 Question 1 Does it appear as though the machines are operating similarly in terms of the mean thickness and the variation of this thickness? Describe the differences you see. Sheet Press-1 Press-2 Press-3 1 0.1994 0.1966 0.1735 2 0.1644 0.1934 0.1787 3 0.2160 0.1955 0.1844 4 0.1883 0.1946 0.1835 5 0.2167 0.1958 0.1793 16 0.2241 0.1999 0.2060 17 0.1960 0.1951 0.2104 18 0.1953 0.2019 0.1959 19 0.1802 0.2004 0.2095 20 0.1881 0.2078 0.2102 21 0.1834 0.1872 0.2067 22 0.2014 0.2092 0.2138 23 0.1989 0.1880 0.2176 24 0.1928 0.1895 0.2205 25 0.1698 0.2002 0.2304 Mean 0.1937 0.1973 0.1998 Standard Deviation 0.0157 0.0078 0.0144 Looking at the mean and SD of the thickness of sheets that each press, it seems as though the means are similar, for the most part, and the standard deviations are not too far apart from each mean. The key differences that I notice are that the standard deviation for Press 1 is higher than the other SD’s and the mean of Press-3 is slightly higher than the other means. Question 2

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Which presses produced the largest and smallest thickness ranges, and what are these ranges? Include your charts. 1 2 3 0.0000 0.0500 0.1000 0.1500 0.2000 0.2500 0.1937 0.1973 0.1998 0.0157 0.0078 0.0144 0.0597 0.0254 0.0569 1.0000 2.0000 3.0000 Press Measures Mean Standard Deviation Range Thickness (in.) The press that produces the largest thickness range is Press-1 (just barely) with a range of .0597
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