X3.29 The quarterly revenues of a small medical supply company for the lastseveral years (27 quarters) were plotted and seen to have a roughly lineartrend component. The information below was computed for y₁. Y₂.....Y27 using one of the company's spreadsheet computer programs.t=1,2,..., 27y, quarterly gross revenues ($10,000)Σ y = 7,146 3ty w 113,615SS-120,640a. Using the method of least squares, fit a linear trend model to therevenue data.b. Test for significance of the trend component assuming indepen-dent, normally distributed error terms.c. Forecast revenues for t= 28 and t = 29 using the model fit in part(a).d. Construct 95% prediction intervals for y28 and Y29-e. Construct 90% prediction intervals for y2a and Y20

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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