The cotton aphid poses a threat to cotton cropsin Iraq. The accompanying data ony = infestation rate (aphids/100 leaves)X1 = mean temperature (°C)x, = mean relative humidityappeared in the article “Estimation of the EconomicThreshold of Infestation for Cotton Aphid" (MesopotamiaJournal of Agriculture [1982]: 71–75). Use the data to findthe estimated regression equation and assess the utility ofthe multiple regression modely = a + Bjx1 + Bx2 + eyX1X2yX1X26121.057.07724.848.08728.341.59326.056.09827.558.010027.131.010426.836.511829.041.010228.340.07434.025.06330.534.04328.313.02730.837.01931.019.01433.620.02331.817.03031.321.02533.518.56733.024.54034.516.034.36.02134.326.01833.021.02326.526.04232.028.05627.324.56027.839.05925.829.08225.041.08918.553.57726.051.010219.048.010818.070.09716.379.5Given: significance level = 0.05Required:1. Regression Equation2. F and P-value3. Decision and Conclusion

1. Excel Procedure: Enter Y, X1, X2 in Excel>Data>Data Analysis> ‘Regression’>Select Y…

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A First Course in Probability (10th Edition)

10th Edition

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Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

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Climate change and CO2 2011 Data collected fromaround the globe show that the earth is getting warmer.The most common theory relates climate change to anincrease in atmospheric levels of carbon dioxide (CO2),a greenhouse gas. The mean annual CO2 concentration inthe atmosphere (parts per million) is measured at the top of Mauna Loa in Hawaii, away from any local contami-nants. (Available at ftp://ftp.cmdl.noaa.gov/ccg/co2/ trends/co2_annmean_mlo.tx)The mean surface air temperature is recorded as thechange in °C relative to a base period of 1951 to 1980.(Available at data.giss.nasa.gov/gistemp/graphs_v3/)Here are a scatterplot and regression for the years from1959 to 2011:Dependent variable is TempR-squared = 82.3%s = 0.0985 with 53 - 2 = 51 degrees of freedomVariable Coefficient SE(Coeff) t-Ratio P-ValueIntercept -2.98861 0.2086 -14.3 ...0.0001CO2 0.0092 0.0006 15.4 ...0.0001a) Write the equation of the regression line.b) Is there evidence of an association between CO2 leveland global…
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The cotton aphid poses a threat to cotton crop: in Iraq. The accompanying data on y = infestation rate (aphids/100 leaves) X1 = mean temperature (°C) X2 = mean relative humidity %3D