4) Compute the variance and standard deviation of the variable Growth Potential Growth Potential Z - Z (Z – Ž)² Z 7 10 8 7 3 3 7 2. 9, 2. 6,

Here's a table with average monthly price of a stock from Jan 2021-July 2021. Month Price Jan 29000 Feb 27000 Mar 31000 Apr 30000 May 32000 June 28000 July 29000 Using a 3-period weighted moving average with weights (wt, wt-1, W-2) = (0.6, 0.2, 0.2), the predicted price August is Using an exponential smoothing model with = 0.4, and with the initial predicted price for Jan the same as the observed price for January, the predicted price for August is % Now, let's suppose that we finally observe that the price for August is 30000. The absolute percent error (APE) of your prediction for August is using the weighted moving average method and % using the exponential smoothing model. (Note: Round your answer to the nearest 2 decimal places. For your APE answer for example let's say you get 0.06786 from Excel, then you should type-in 6.79 as your answer here since it is represented as percentage. Do not enter any symbols other than integers and decimal.)

Q to =://r02.core.learn.edgenuity.com/Player/ ning Unit Test Unit Test Active TIME REMAINING 01:21:21 What is the equation of the least-squares regression An analysis of the decay of 10 grams of an unstable element over time was completed and is displayed in the computer output. line? O Element = 2.305 - 0.101 In(Time) Regression Analysis: In (Element) versus Time Predictor Coef SE Coef O In(Element) = 2.305 - 0.101(Time) Constant 2.305 0.021 109.76 0.000 Time -0.101 0.0007 -132.99 0.000 R-Sq (adj) =0.999 O In(Element) = -0.101 + 2.305 (Time) s=0.0079 R-Sq=0.99 O In(Time) = - 0.101 + 2.305(Element) Save and Exit Next Submit Mark this and return a ch ort sc 144 & 5 L. 8

Suppose you obtain the following regression model, E[y]=91+79*x1 +20*x1*x2. What is the impact of  a 39 unit change of x1 on the expected value of y when x2 is at its mean of 40?