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- A teacher is compiling data and needs to find the number of B grades. A B grade is any score greater than 79 and less than 90. If the data is listed in B1 through B210, which function would count the grades correctly? Group of answer choices =COUNTIFS(B1:B210,>79,B1:B210,<90) =COUNTIF(B1:B210,">79") =COUNTIFS(B1:B210,">79",B1:B210,"<90") =COUNTIFS(B1:B210,">79","<90")A firms production function is Q(L) = 15L2 - 1L3 , where output (Q) is a function of a single input labour (L). Find the number of workers required to maximize total For what number of workers is average product maximum? *The symbols are not clear, can this please be redone? Please complete using Microsoft wordRELEVANT Magazine (a culture magazine) keeps in touch and informs their readers by posting updates through various social networks. These updates take up a large part of both the marketing and editorial teams’ time. Because these updates take so much time, marketing is interested in knowing whether reducing posts (updates) on Facebook (a specific site) will also lessen their fan interaction; if not, both departments may pursue using their time in more productive ways. The weekly number of posts (updates) and fan interactions for Facebook during a 9-week period are recorded in Table. Compute the covariance and correlation between Facebook posts (site updates) and fan interactions. The data are stored in the data file RELEVANT Magazine. Facebook Posts (site updates) and Fan InteractionsFacebook posts (updates), x 16 31 27 23 15 17 17 18 14Fan interactions, y 165 314 280 195 137 286 199 128 462
- > library(party) > myFormula <- Species ~ Sepal.Length + Sepal.Width + Petal.Length + Petal.Width > iris_ctree <- ctree(myFormula, data=trainData) > table(predict(iris_ctree), trainData$Species) What is the process in the above code in R? options: Building a decision tree for the iris data with function ctree() in package party by using myFormula to put Species as the target variable and all other variables are independent variables, and then using predict() function to check the prediction. Building a linear regression model for the iris data with function ctree() in package party by using myFormula to put Species as dependent variable and all other variables are independent variables, and then using predict() function to check the prediction. Building a random forest for the iris data with function ctree() in package party by using myFormula to put Species as dependent variable and all other variables are…Some college students like taking online classes. Other students prefer face-to-face classes. COVID provided an opportunity to see what would happen if everyone was forced to take math classes online. One of the ways that student success is monitored by colleges is with pass rates. The pass rate is the percent of students who pass the class (with a 2.0 or higher grade). For some of the Pierce College math classes, the average pre-COVID pass rate is 71.0%In this problem, we will examine the change in student success, as measured by pass rates in math classes. Test the hypothesis that during the COVID quarters (spring 2020-winter 2021), the mean pass rate is different than 71.0%. Use a level of significance of 0.05 to test that hypothesis. For the hypotheses, write mu if you want μμ and write ne with a space before and after it if you want ≠≠.Write the hypotheses: H0H0: H1:H1: The data in the table below is based on a random selection (with replacement) of pass rates during COVID…Some college students like taking online classes. Other students prefer face-to-face classes. COVID provided an opportunity to see what would happen if everyone was forced to take math classes online. One of the ways that student success is monitored by colleges is with pass rates. The pass rate is the percent of students who pass the class (with a 2.0 or higher grade). For some of the Pierce College math classes, the average pre-COVID pass rate is 71.0%In this problem, we will examine the change in student success, as measured by pass rates in math classes. Test the hypothesis that during the COVID quarters (spring 2020-winter 2021), the mean pass rate is different than 71.0%. Use a level of significance of 0.05 to test that hypothesis. For the hypotheses, write mu if you want μμ and write ne with a space before and after it if you want ≠≠.Write the hypotheses: H0H0: H1:H1: The data in the table below is based on a random selection (with replacement) of pass rates during…
- Give a word problem regarding time rates: algebraic functionsShow FBD, no FBD gets downvoteQ6.3 The World Bank collected data on the percentage of GDP that a country spends on health expenditures ("Health expenditure," 2013) and also the percentage of women receiving prenatal care ("Pregnant woman receiving," 2013). The data for 14 countries where this information is available for the year 2011 are in following table (note: outlier data has been removed): Data of Health Expenditure versus Prenatal Care Health Expenditure (% of GDP) Prenatal Care (%) 3.7 54.6 5.2 93.7 5.2 84.7 10.0 100.0 4.7 42.5 4.8 96.4 6.0 77.1 5.4 58.3 4.8 95.4 4.1 78.0 6.0 93.3 9.5 93.3 6.8 93.7 6.1 89.8 Test at the 5% level for a correlation between percentage spent on health expenditure and the percentage of women receiving prenatal care. (v) Using tables, calculator, or spreadsheet: Determine and enter p-value corresponding to test statistic. Enter value in decimal form rounded to nearest thousandth.…Southerly Showtime Movie Theaters, Inc. owns and operates a chain of cinemas in several markets in the southern United States. The owners would like to estimate weekly gross revenue as a function of advertising expenditures. Data for a sample of eight markets for a recent week follow. (Let x1 represent Television Advertising ($100s), x2 represent Newspaper Advertising ($100s), and y represent Weekly Gross Revenue ($100s).) Market Weekly Gross Revenue ($100s) Television Advertising ($100s) Newspaper Advertising ($100s) Market 1 101.3 4.9 1.4 Market 2 51.9 2.9 3.1 Market 3 74.8 3.9 1.4 Market 4 126.2 4.4 4.2 Market 5 137.8 3.7 3.9 Market 6 101.4 3.4 2.4 Market 7 237.8 5.1 8.5 Market 8 219.6 7.0 5.7 (a) Develop an estimated linear regression equation with the amount of television advertising as the independent variable. (Round your numerical values to four decimal places.) ŷ = Test for a significant relationship between the amount spent on television…
- Feed utilization rates obtained from a fattening program in male and female Bozırk cattlegiven below. Is there a difference between genders in terms of feed utilization rates? Testplease. (α = 0.05)Which statement best explains whether or not the table shown represents a function?A.The table represents a function because no output value are repeatedB.The table represents a function because each output value is greater than each input valueC.The table does not represent a function because one input value has two different output valuesD. The table does not represent a function because the ratio of each output value to its input value is not the same for all ordered pairsSeveral states have argued that the 65-mph speed limit has no justification and have refused to enforce it. The federal Department of Transportation (DOT) believes that the 65-mph limit saves lives. To illustrate its contention, the department regressed the number of traffic fatalities (Y) last year in a state on the state’s population (X1), the number of days of snow cover (X2), and the average speed of all cars (X3). The results are shown below. Table 10: Model Summary Model R R Square Adjusted R Square Std. Error of the Estimate 1 .821 a .780 .613 3.258 a. Predictors: (Constant), population, days of snow, average speed Table 11: Coefficients Coefficientsa Model Unstandardized Coefficients Standardized Coefficients t Sig. B Std. Error Beta 1 (Constant) 1.4 2.957 .473 .584 Population .00029 .00003 .0034 9.667 .000 Days of Snow 2.4 .62 .759 3.871 .000 Average Speed 10.3 1.1…
