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# Mathcad - UF-ESI-6321-13-06-01 - UF-ESI-6321 UF-ESI-01.xmcd...

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UF-ESI-6321 UF-ESI-6321-13-06-01.xmcd page 1 of 6 13.6.1 Consider the data set in DS 13.6.1. This worksheet will use Mathcad and the matrix methods introduced later in the chapter by inserting a value of 1 for x <0> . x 1 1 1 1 1 1 1 1 1 1 1 0.500000000000000 0.600000023841857 0.699999988079071 0.800000011920928 0.899999976158142 1.000000000000000 1.100000023841850 1.200000047683710 1.299999952316280 1.399999976158140 1.500000000000000 := y 5.900000095367430 8.899999618530270 7.099999904632560 10.100000381469700 15.899999618530200 14.800000190734800 23.299999237060500 28.200000762939400 31.299999237060500 44.799999237060500 49.099998474121000 := Luther Setzer 1 NASA Pkwy E Stop NEM3, Kennedy Space Center, FL 32899 (321) 544-7435

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UF-ESI-6321 UF-ESI-6321-13-06-01.xmcd page 2 of 6 (a) Plot the response variable y against the input variable x and confirm that the quadratic model y β 0 β 1 x 1 ⟨ ⟩ + β 2 x 1 ⟨ ⟩ ( ) 2 + = appears to be appropriate. 0.4 0.6 0.8 1 1.2 1.4 1.6 0 10 20 30 40 50 Residual versus Cost y x 1 ⟨⟩ This set of data points does appear quadratically related. The data plot suggests there is some curvature in the relationship between x and y . A
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Mathcad - UF-ESI-6321-13-06-01 - UF-ESI-6321 UF-ESI-01.xmcd...

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