data cleaning problems

Refer to the scattergram and the Ordinary Least Squares line of best fit, in Figure 1. T 10 8 6 4 2 0 0 2 4) Figure 1 y=-0.7941x10.515 R=0.9425 4 6 X 8 If x increases by 1 unit, y will 10 12 1) increases by 0.7941 units. 2) decreases by 0.7941 units. 3) increases by (0.7941 +10.515) units. decreases by (0.7941+ 10.515) units.

Consider the following set of dependent and independent variables. Complete parts a through c below. y 9 11 D 15 15 21 24 28 32 X1 2 6 6 8 6 11 15 20 X2 16 10 14 11 3 8 7 4 a. Using technology, construct a regression model using both independent variables. y= (15.3952) + (1.0092) x₁ + (-0.5869)x2 (Round to four decimal places as needed.) b. Test the significance of each independent variable using α = 0.05. Test the significance of x₁. Identify the null and alternative hypotheses. Ho B₁ = H₁ B₁ 0 0 (Type integers or decimals.) Calculate the appropriate test statistic. The test statistic is 4.20 (Round to two decimal places as needed.) Determine the appropriate critical value(s) for α = 0.05. The critical value(s) is (are) ☐ (Round to two decimal places as needed. Use a comma to separate answers as needed.)

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Find out coefficient of Variation (CV). Note: Use MS-EXCEL for the Calculation, Take Snapshot after analysis

If there is positive correlation between two sets of numbers, then _______. Group of answer choices r = 0 r < 0 r > 0 SSE=1 MSE = 1

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8. Assume Model 2 with D₁ = $2 and r= 10%. Calculate different Po's with g = 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, and 9%. Plot Po (= Y axis) against g in Excel. Comment. 6%, 7%, 9. Assume Model 2 with D₁ = $2 and g = 5%. Calculate different Po's with r = 8%, 9%, 10%, 11%, 12%, 13%, 14%, and 15%. Plot Po(= Y axis) against r in the same Excel file. Comment.

Calculate the relative frequency P(E) using the given information. N = 400,    fr(E) = 300 P(E) =

15. In the mean-standard deviation graph an indifference curve has a ____________slope. a. negative b. zero c. positive d. northeast. e. cannot be determined

Task 1 Using the following the data below, graph the result and use linear regression to obtain the equation of a line. y 3 1 5.5 8. 3 10.5 13 5. 15.5

RVW (Restored Volkswagens) buys 15 used VW's at each of two car auctions each week held at different locations. It then transports the cars to repair shops it contracts with. When they are restored to RVW's specifications, RVW sells 10 each to three different used car lots. There are various costs associated with the average purchase and transportation prices from each auction to each repair shop. Also there are transportation costs from the repair shops to the used car lots. RVW is concerned with minimizing its total cost given the costs in the table below. a. Given the costs below, draw a network representation for this problem. Used Car Lots L2 Repair Shops si 550 600 S2 500 LI L3 500 Auction 1 sI 250 300 Auction 2 450 S2 350 650 450 b. Formulate this problem as a transshipment linear programming model. Report the optimal solution using excel solver. с.

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Consider the following set of dependent and independent variables. Complete parts a through c below. y 10 11 15 15 21 24 27 32 X1 2 6 6 8 6 11 17 21 X2 17 9 13 10 3 8 6 4 a. Using technology, construct a regression model using both independent variables. = + + (Round to four decimal places as needed.)

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For the data set 7 9 12 4 8 the mean is

1

Calculate: where x=1.0315, and n=31

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The two-dimensional wave equation describing the vibrations of an infi- nite string is Θη Ot2 2021 მ2 where n = n(x,t), — -x 0 is a constant. Its general solution can be written as n(x,t) = F(x-ct) + G(x + ct), with F and G arbitrary smooth functions. If at time t = 0 the shape of the string is n(x, t = 0) at 9 = 5+x4 and the string is released with velocity (x, t = 0) = 0, determine n(x,t) for t > 0.

SHOW YOUR WORK IN THE SPACES PROVIDED BELOW FOR FULL CREDIT.   1) Understanding Normal Distribution (2p)   a. Which normal curve has a greater mean?   b. Which normal curve has a greater standard deviation?

Dr. Thomas graduated from West Virginia University with a code value = 1 whlle Professor Harrison graduated from the Marshall Unlversity with a code value = 2. The scale of measurement likely represented by this Information Is: O A. ratio. O B. nominal. O C. ordinal. O D. interval.

Find the APR using the formula APR= 2nr/n+1 when n= 38 and r= 8%