Consider the following data on 20 chemical reactions, with Y= chromatographic retention time (seconds) and X=...
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Consider the following data on 20 chemical reactions, with Y= chromatographic retention time (seconds) and X= molecular weight (gm/mole). Retention Time and Molecular Weight (n = 20) Retention Molecular Weight 136.24 Name Time alpha-pinene cyclopentene p-diethyl benzene decane 234.50 95.27 68.12 284.00 250.60 134.22 142.29 toluene 174.00 92.14 benzene 135.70 78.11 2-methyl pentane 2,3 dimethylbutane 1,7-octadiene 1,2,4-trimethyl benzene 2,3,4-trimethyl pentane ethylcyclohexane limonene 97.24 86.18 199.70 86.18 172.20 262.70 110.20 128.19 168.98 114.23 195.07 112.22 271.50 136.24 methyl cyclohexane m-diethyl benzene 2,3-dimethyl pentane 2,2-dimethyl butane pentane isooctane 153.57 98.19 281.50 131.83 134.22 100.20 89.34 86.18 78.00 72.15 136.90 114.23 86.18 hexane 106.00 Click here for the Excel Data File (a) Write the fitted regression equation. (Round your answers to 4 decimal places. A negative value should be Indicated by a mlnus sign.) (b) Calculate R. (Round your answer to 4 decimal places.) (c) Choose the right option. The regression line does show a strong positive linear relationship between molecular weight and retention time, indicating that the greater the molecular weight the greater is the retention time. O The regression line shows a strong negative relationship between the two variables, indicating the greater the molecular weight the lesser is the retention time. Retention Time and Molecular Weight Selected Chemicals (n = 20) Molecular Wt Name alpha-pinene cyclopentene p-diethyl benzene decane toluene Retention Time 234.50 136.24 LearningStats 95.27 68. 12 Copyright © 2019 by The McGraw-Hill Companies 284.00 134.22 250.60 142.29 174.00 92.14 This spreadsheet is intended solely for educational purposes by licensed users of Connect benzene 135.70 78.11 2-methyl pentane 2,3 dimethylbutane 1,7-octadiene 1,2,4-trimethyl benzene 2,3,4-trimethyl pentane ethylcyclohexane limonene methyl cyclohexane m-diethyl benzene 2,3-dimethyl pentane 2,2-dimethyl butane pentane isooctane 97.24 86.18 100.70 86.18 172.20 110.20 262.70 120.19 160.98 114.23 195.07 112.22 Source: Data are courtesy of John Seeley of Oakland University. Retention Time is chromatographic retention time (in seconds) and Molecular Wt is in gm / mole. 271.50 136.24 153.57 98.19 281.50 134.22 131.83 100.20 89.34 86.18 78.00 72.15 136.90 114.23 hexane 106.00 86.18 Consider the following data on 20 chemical reactions, with Y= chromatographic retention time (seconds) and X= molecular weight (gm/mole). Retention Time and Molecular Weight (n = 20) Retention Molecular Weight 136.24 Name Time alpha-pinene cyclopentene p-diethyl benzene decane 234.50 95.27 68.12 284.00 250.60 134.22 142.29 toluene 174.00 92.14 benzene 135.70 78.11 2-methyl pentane 2,3 dimethylbutane 1,7-octadiene 1,2,4-trimethyl benzene 2,3,4-trimethyl pentane ethylcyclohexane limonene 97.24 86.18 199.70 86.18 172.20 262.70 110.20 128.19 168.98 114.23 195.07 112.22 271.50 136.24 methyl cyclohexane m-diethyl benzene 2,3-dimethyl pentane 2,2-dimethyl butane pentane isooctane 153.57 98.19 281.50 131.83 134.22 100.20 89.34 86.18 78.00 72.15 136.90 114.23 86.18 hexane 106.00 Click here for the Excel Data File (a) Write the fitted regression equation. (Round your answers to 4 decimal places. A negative value should be Indicated by a mlnus sign.) (b) Calculate R. (Round your answer to 4 decimal places.) (c) Choose the right option. The regression line does show a strong positive linear relationship between molecular weight and retention time, indicating that the greater the molecular weight the greater is the retention time. O The regression line shows a strong negative relationship between the two variables, indicating the greater the molecular weight the lesser is the retention time. Retention Time and Molecular Weight Selected Chemicals (n = 20) Molecular Wt Name alpha-pinene cyclopentene p-diethyl benzene decane toluene Retention Time 234.50 136.24 LearningStats 95.27 68. 12 Copyright © 2019 by The McGraw-Hill Companies 284.00 134.22 250.60 142.29 174.00 92.14 This spreadsheet is intended solely for educational purposes by licensed users of Connect benzene 135.70 78.11 2-methyl pentane 2,3 dimethylbutane 1,7-octadiene 1,2,4-trimethyl benzene 2,3,4-trimethyl pentane ethylcyclohexane limonene methyl cyclohexane m-diethyl benzene 2,3-dimethyl pentane 2,2-dimethyl butane pentane isooctane 97.24 86.18 100.70 86.18 172.20 110.20 262.70 120.19 160.98 114.23 195.07 112.22 Source: Data are courtesy of John Seeley of Oakland University. Retention Time is chromatographic retention time (in seconds) and Molecular Wt is in gm / mole. 271.50 136.24 153.57 98.19 281.50 134.22 131.83 100.20 89.34 86.18 78.00 72.15 136.90 114.23 hexane 106.00 86.18
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Applied Statistics in Business and Economics
ISBN: 978-0073521480
4th edition
Authors: David Doane, Lori Seward
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