Difference between parallelogram method and head-to-tail method
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A: Clustered Standard Errors occur when some observations in a data set are related to each other. It…
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A: If in a regression of some actual data against the predictions from two models, if the coefficient…
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A: Provided least square line is:
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A: y^ =β0 + (β1)x Interpretation of slope: By increasing a unit in x, there is on an average β1 unit…
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A: Data : { (1,2) , (3,6) , (5,14) } According to least squares method, We have to calculate regression…
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A: Please find the explanation below. Thank you.
Q: If least-square line for X and Y is given as y= 0.17x-5.4, estimate the Y value when X=0.7. Select…
A: Given regression equation isY=0.17x-5.4If x=0.7 theny=?
Q: given data. Ro
A: Let the equation of regression line by least-squares method is y = a + bx Where y is dependent…
Q: h) Give a 'real world' interpretation of the slope and y-intercept in the context of this problem.
A: We have the slope intercept form , y=mx+bwhere m is slope and b is intercept slope - change in y…
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A: Multicollinearity:Multicollinearity is the presence of high correlation among the predictor…
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A: From given data, X Y X*Y X*X 10 8.04 80.4 100 8 6.95 55.6 64 13 7.58 98.54 169 9 8.81…
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A: Here I have to express, what is linear regression ? How to apply with real life situation ?
Q: In the least-squares line ŷ = 5 – 8x, what is the value of the slope? When x changes by 1 unit, by…
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A: 5. It is needed to find the regression equation.
Q: Suppose that you have the following points (1,10), (3,8) (5,7) ( 7,6) and ( 4.4). Write the equation…
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Q: Use the equation of the regression line and identify the slope and y-intercept. 4) y = 140.4 - 6.2x…
A: given regression equation y^ = 140.4 - 6.2X we have to identify slope and intercept
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A: Given information: The general linear regression model is given as Y=a+b1·X1+b2·X2.
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A: Reviewing information, n=No. of vehicles= 30 Y : Gas mileage of cars in MPG Var(Y)= 39.28
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Q: How do you implement nonlinear and multiple regression?
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A: The objective is to find the equation of the regression line using the method of least squares:
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Q: regression coefficients differ in multiple regression and simple linear regression?
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Difference between parallelogram method and head-to-tail method
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- Centerville is the headquarters of Greedy Cablevision Inc. The cable company is about to expand service to two nearby towns, Springfield and Shelbyville. There needs to be cable connecting Centerville to both towns. The idea is to save on the cost of cable by arranging the cable in a Y-shaped configuation. Centerville is located at (7,0) in the ry plane, Springfield is at (0, 4), and Shelbyville is at (0, - 4). The cable runs from Centerville to some point (r, 0) on the r-axis where it splits into two branches going to Springfield and Shelbyville. Find the location (z,0) that will minimize the amount of cable between the 3 towns and compute the amount of cable needed. Justify your answer. To solve this problem we need to minimize the following function of r: f(T) We find that f(1) has a critical number at z To verify that f(¤) has a minimum at this critical number we compute the second derivative f(r) and find that its value at the critical number is ,a positive number. Thus the…Solve with cubic spline method which interpolate the following dataset of (x,y) points: (97,16), (123,21), (153,25), (179,31); estimate the value for x=140.To determine if additional shelf space to the store brand canned vegetables or increasing advertising expenditures would be more effective strategy to expand sales would I use a simple linear model, multiple linear regression or an interaction model? What equation would I use
- What’s a linear modelResearchers collected samples of water from streams in a mountain range to investigate the effects of acid rain. They measured the pH (acidity) of the water and classified the streams with respect to the kind of substrate (type of rock over which they flow). A lower pH means the water is more acidic. The plot to the right shows the pH of the streams by substrate (limestone, mixed, or shale). Selected parts of a software analysis comparing pH of streams with mixed and shale substrates are shown below. Complete parts a through c. 2-Sample t-test of μ1−μ2=0, Difference Between Means=0.195 t-Statistic=5.30 w/125 df, P≤0.0001 a) State the null and alternative hypotheses for this test. Choose the correct answer below. A. H0: μM−μS=0; HA: μM−μS≠0 B. H0: μM−μS≤0; HA: μM−μS>0 C. H0: μM−μS≥0; HA: μM−μS<0 D. H0: μM−μS≠0; HA: μM−μS=0 Part 2 b) From the information you have, do the assumptions and conditions appear to be met? Which…For the given data (0, 1), (1, 1), (2, 3), (3, 5) find the line y = ao + a1x that best fits the data in the least square sense.
- According to the data reported by the New York State Department of Health regarding West Nile Virus for the years 2000-2008, the least squares line equation for the number of reported dead birds (x) versus the number of human West Nile virus cases (y) is y=−10.2638+0.0491x. If the number of dead birds reported in a year is 732, how many human cases of West Nile virus can be expected? Also we know r=0.5490. No prediction can be made. 19.6 26 38.1(a) Make a scatter diagram of the data. (b) Use the regression feature of a calculator to find the best-fitting linear function for the data. Graph the function with the data. (c) Repeat part (b) for a cubic function. (d) Estimate the minimum sight distance for a car traveling 68 mph using the functions from parts (b) and (c). (e) By comparing the graphs of the functions in parts (b) and (c) with the data, decide which function best fits the given data.Explain why a 3 way interaction will have more regression lines than a 2 way interaction.
- Flying twice as farA flight from Los Angeles to ABQ is about 2 hours but is 670.2 miles.A flight from San Jose to Chicago is 4 hours but is 1859.0 miles.Can anyone explain why the travel time from San Jose to Chicago is notlonger and closer to 5.75 hours?If the distance increase by 2, shouldnt the time increase by a factorof 2 as well?1. Write a linear model for this question. Takeoff and landing will take a fixed amount of time. Actualtravel in the air will take time proportional to the distance traveled. Think about which of thevariables (time and distance) is the independent variable, and identify the slope and intercept withtheir units.2. Use the data in the quotation to estimate the two constants in your linear model.Explain Variable Step Size Methods?Put the following steps, for finding a linear model for a set of data using a TI-84 calculator, in the correct order. 1 [Choose] [Choose] Enter your data in STAT-->EDIT with inputs in L1 and outputs in L2 Press STAT-->CALC to access the menu of possible models. Read off your answer, being careful to match the slope to the coefficient of x. Be sure XList: L1, YList: L2, Freg List: (empty) and select "Calculate" Choose LinReg(ax+b) or LinReg(a+bx) [Choose] 3. 4. [Choose] [Choose ]
