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kayla richards

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Mycorrhizae, present for most plant species, generally do not help roots with the uptake of ____. A. water B. nitrogen C. phosphate D. carbon

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In thread rolling, the material is displaced rather than cut. Which advantage does this confer when creating high-strength fasteners? Group of answer choices A continuous grain flow around the threads that improves fatigue resistance and thread shear strength. A higher production cost but guaranteed elimination of residual stresses The ability to easily produce extremely deep threads without special equipment

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Use of records or data-available methods of data collection would be most appropriate: When research subjects are considered to be illiterate When participants are not known to be reliable historians When the goal of research is to analyze trends and change over time When the researcher suspects the subject may alter responses to please the researcher

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Calculate the p-value for each part. (Round to four decimal places.) Test Statistic p-value (a) Ho: p = 0.75 versus HA: p <0.75, a = 0.05 z = -3.03 (b) Ho: p = 0.40 versus HA: p > 0.40, a = 0.05 z = -0.79 (c) Ho: p = 0.15 versus HA: p ? 0.15, a = 0.01 z = 1.61

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Determine whether the following pair of molecules represent: CH$_3$ OH H+OH CH$_2$CH$_3$ and OH H+CH$_3$ CH$_2$CH$_3$ Identical Compounds constitutional isomers Enantiomers Diastereomers

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9) The "fathers of the Internet" are Vinton Cerf and Robert Kahn Robert Cailliau O Bill Gates O Tim Berners-Lee

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1. Please construct a new dataset by either adding two independent variables or removing two independent variables from finalsample.dta dataset. If you choose to add two independent variables, you could add any two independent variables that you think help explain stock returns. If you choose to remove two independent variables, you could remove any two independent variables that already exist in the finalsample.dta dataset. 2. Split your new dataset into training and testing samples. Testing sample should include data with year>=2016. 3. Give a value for min_samples_leaf (you could pick any value) and train DecisionTreeRegressor using your new training sample. Use the trained model to predict returns based on your new testing sample. Report the average return of the portfolio that consists of the 100 stocks with the highest predicted returns in each year-month. Also, report the Sharpe ratio of the portfolio. 4. Give values for min_samples_leaf, n_estimators, and max_samples (you could pick any value), and train RandomForestRegressor using your new training sample. Use the trained model to predict returns based on your new testing sample. Report the average return of the portfolio that consists of the 100 stocks with the highest predicted returns in each year-month. Also, report the Sharpe ratio of the portfolio. 5. Give values for min_samples_leaf, n_estimators, and max_samples (you could pick any value), and train ExtraTreesRegressor using your new training sample. Use the trained model to predict returns based on your new testing sample. Report the average return of the portfolio that consists of the 100 stocks with the highest predicted returns in each year-month. Also, report the Sharpe ratio of the portfolio. 6. Give values for min_samples_leaf and max_iter (you could pick any value), and train HistGradientBoostingRegressor using your new training sample. Use the trained model to predict returns based on your new testing sample. Report the average return of the portfolio that consists of the 100 stocks with the highest predicted returns in each year-month. Also, report the Sharpe ratio of the portfolio.

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I WILL UPVOTE FOR A CORRECT ANSWER W/ EXPLANATION (Click the icon to view the performance report.) Requirement Be sure to enter in a "0". A variance of zero is considered favorable.) Lanco Industries Flexible Budget Performance Report: Sales and Operating Expenses For the Month Ended November 30 Flexible budget Flexible Volume Output units Sales revenue Less: Variable expenses Contribution margin Less: Fixed expenses Operating income Data table Lanco Industries has a relevant range extend (Click the icon to view the performance report.) actual performance for November. Requirement Label each variance as favorable (F) or unfavorable (U). If the variance is 0, make sure to enter in a 0*. A variance of zero is considered favorable.) Data table Lanco Industries Flexible Budget Performance Report: Sales and Operating Expenses For the Month Ended November 30 Flexible Actual variance Budget 24,000 24,000 c . Volume Variance Lanco Industries Master Budget 30,400 2 Flexible Budget Performance Report: Sales and Operating Expenses 3 For the Month Ended November 30 Flexible budget Flexible Volume Master Actual variance Budget Variance Budget Output units 24,000 ? 30,400 6Sales revenue $ 225,000 $5,400 F ? ? ? Less: Variable expenses 172,800| ? ? ? 191,520 Contribution margin ? ? ? ? 9Less:Fixed expenses 18,000| ? ? 25,500 10 Operating income ? ? ? ? Output units Sales revenue $ 225,000 $ Less: Variable expenses 172,800 Contribution margin 52,200 Less: Fixed expenses 18,000 Operating income 34,200 5,400 F U 219,600 151,200 191,520 U 7,500 F U 25,500 25,500 U Print Dona

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Suppose that a natural disaster kills over half the members of a population. This is an example of: Group of answer choices directional selection gene flow adaptive radiation stabilizing selection genetic drift

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Question 3 A somatic cell from a corn plant normally contains 20 chromosomes. How many sister chromatids would that cell contain during G2 of the cell cycle? O 20 40 O 10 O 0

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