Lus Fertilizer Company distributes fertilizer to 1 and garden shops. The company must base its odnction schedule on a forecast of bow many lizer will be demanded from it. The company 1 the following data for the past three years s records. Demand for FertlUzer (ton) 105 Quarter 2 150 3 93 121 140 170 105
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- 3. You are curious to understand if there is a relationship between the average grade (in %) that students received in Assignment 1, 2, and 3 of ECOR 2050 (assignments that covered midterm material) and their grade (in %) in the Midterm of the course. You are limited to collect 7 sets of data (midterm vs average assignments). For that, you can check the google sheets to find grades of assignment 1, 2, and 3 and midterm for 7 students. You should be careful that your data set is not biased. a) Collect the information and record them in the table below (please use a typed table/numbers as we need to copy/paste your numbers into Excel for checking your solution and marking). Mention how you ensured that your data set is random and unbiased. Student 2 3 4 6. 7 Grade (%) Average of Assignment 1, 2, and 3 (assignments before midterm) Midterm b) Using the collected information, conduct a simple linear regression analysis and find the regression line. Also, estimate the coefficient of…5. Management of a home appliance store wants tounderstand the growth pattern of the monthly sales of a new technology device over the past two years.The managers have recorded the relevant data inthe file P13_05.xlsx. Have the sales of this devicebeen growing linearly over the past 24 months? Byexamining the results of a linear trend line, explainwhy or why not.2. Creates market power in the Illarket of Nepal. Suggest the role of NRB to prevent market failure in this situation on the Consider the following data for sales of biscuits produced in Nepal for 5 years. a. Year 2017 2018 2019 2020 2021 Price (Rs) 20apital 18 16 14 12 Sales expenditure (Rs in million) 2626 be 10 PY 15 22 26 37 Sales of Biscuit (1000 units) 30 2 40 52 58 70 Derive the trend line equation and forecast the sales of Biscuits for no slow Vegular fintis 6 2022. b. (1) Derive linear demand function of biscuits on price and estimate the sales for 2023 when price decreases to Rs 10. (i) Derive linear demand function of biscuits on sales expenditure and estimate the sales for 2023 when sales expenditure increases to Rs 40 million. (iii) Which strategy will be effective to promote of sales of biscuits in 20232 Justify it by using the value of price and sales elasticities. P.T.O.
- 10. The percent of 10th grade students who have smoked frequently in the last 30 days has greatly decreased, from 16.3% in 1995 to 8.3% in 2004. (a) Find the average rate of change over the 9 year period in the percent of 10th grade students who have smoked frequently in the last 30 days. (b) Use this data to make a linear model predicting the number % of 10th graders who smoked frequently in the past 30 days for a given year. (c) Use this model to make an estimate for the % of 10th grade students who smoked frequently in the past 30 days in 2010. (d) Use this model to make an estimate for the % of 10th grade students who smoked frequently in the past 30 days in 2015. Is this a good estimate for 2015? Explain:20) Which of the following is not an assumption about the data when using CVP analysis? Total fixed costs remain at a constant level and variable costs per unit remain unchanged at all sales levels. More inventory is purchased than sold. A linear relationship exists between variable costs and sales activity over the relevant range of interest. All costs can be easily and accurately separated into fixed and variable components.In economics we are often faced with causal problems where the endogeneity arises because of simultaneity. A classic example is that if you are interested in estimating a demand curve, the issue is what you observe in the data are equli- birum and prices and quantity which is not only a function of demand but also a function of supply. In this excercise we will generalize the problem of simultaneity bias. Consider a situation where we are interested in the effect of Ti on Yi, i.e. obtaining a consistent estimate of α. But Yi also effects Ti. Let Xi be some exogenous covariates affecting both Yi and Ti. Let us imagine you have an exogenous variable Z which only effects Ti but does not directly effect Yi. In particular, consider the following structural equations: Yi = αTi+Xi′β+ui (1) Ti = ρYi+Xi′γ+Ziδ+νi (2) where E(ui | Xi,Zi) = 0 and E(vi | Xi,Zi) = 0 (a) Show why you cannot you use OLS to estimate α consistently in model 1? (b) Solve for the reduced form equation for Ti…
- Suppose a researcher believes that the occurrence of natural disasters such as earthquakes leads to increased activity in the construction industry. he decides to collect province-level data on employment in the construction industry of an earthquake-prone country, like Japan, and regress this variable on an indicator variable that equals 1 if an earthquake took place in that province in the last five years. a. Should the researcher include province fixed effects in order to control for location specific characteristics of the labor market? b. What can the researcher to control for the location effects?Assume we have data demonstrating a strong linear link between the amount of fertilizer applied to certain plants and their yield. Which is the independent variable in this research question?1. Since the pandemic the price of gasoline varies constantly from the last two months.However, you observed that local gas stations charges higher price. You want to test your hypothesis that local gas stations are charging much more than the national average price for gasoline. What is your claim about this problem? What is the null hypothesis of this study?
- Your state is going to vote on becoming a "right to work" state in the next, and you wonder if there is there a relationship between salary levels and unionization. You find data on salary from the U.S. Census, which is split into three groups: Low; Moderate/About Average, and; High. To see if salary, measured in this way, is associated with unionization you find a variable in the same dataset called "UNION", which has two categories: the respondent has a unionized job and the respondent does not have a unionized job. Because you want to know if you should favor or oppose becoming a "right to work" state, you test these two variables to see if there is an association between salary level and unionized labor. What type of hypothesis test is most appropriate?45. Table 1.2 shows the mean annual compensation of construction workers. bab Abor Cesaione TABLE 1.2 Construction Workers' Average Annual Compensation Annual Total Compensation (dollars) Year 1999 42,598 2000 44,764 2001 47,822 2002 48,966 Source: U.S. Bureau of the Census, Statistical Abstract of the United States, 2004-2005. (a) Find the linear regression equation for the data. (b) Find the slope of the regression line. What does the slope represent? (c) Superimpose the graph of the linear regression equation on a scatter plot of the data. (d) Use the regression equation to predict the construction workers' average annual compensation in the year 2008. Tabl1. A change of a dependent variable is all due to a manipulation of intended independent variables . Explain, with an example, why this statement can be inaccurate . Explain why cause of a regression model can also fail to discover a causal relationship