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Unformatted text preview: Math 350 – Test 1 – Chapters 2 & 4 Printed Name: Calculators are allowed on this test...neighbors are not ! Round answers (where appropriate) to 4 places after the decimal. Grade of 100 1 A study was conducted to demonstrate that soy beans inoculated with nitrogenfixing bacteria yield more and grow adequately without expensive environmentally deleterious synthesized fertilizers. There were 8 inoculated (I) plants and 8 uninoculated (U) plants and the plant yield as measured by pod weight for each plant is given below. Inoculated 1.76 1.45 1.03 1.53 2.34 1.96 1.79 1.21 Uninoculated 0.49 0.85 1.00 1.54 1.01 0.75 2.11 0.92 A 4 pts Find the mean and standard deviation for the inoculated as well as uninoculated plants. ¯ x s ¯ x s Inoculated Uninoculated ............................................................................................................. B 4 pts Based upon the numbers above, does there appear to be a difference in pod growth? Explain. ................................................................................................................
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 Summer '11
 KeithEmmert
 Math, Standard Deviation, Mean, Probability theory, Dr. Emmert

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