An instructor gives the same y vs. x data as given below to four students and asks themto regress the data with least squares regression to y= a, +a,x.1 101 100 400 600 1200203040yThey each come up with four different answers for the straight-line regression model. Onlyone is correct. The correct model isSelect one:О а.1+22.782xоb. у-30х-200Ос. у-60х-1200O d. y=-139.43+29.684x

Answered: Image /qna-images/answer/1dc32ade-aa22-42b7-a3b2-e825ae7d9d27.jpg

Answered: An instructor gives the same y vs. x…

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter7: Distance And Approximation

Section7.3: Least Squares Approximation

Problem 34EQ

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A financial analyst is examining the relationship between stock prices and earnings per share. She chooses publicly traded companies at random and records for each the company's current stock price and the company's earnings per share reported for the past 12 months. Her data are given below, with x denoting the earnings per share from the previous year, and y denoting the current stock price (both in dollars). Based on these data, she computes the least-squares regression line to be =y+−0.2130.046x. This line, along with a scatter plot of her data, is shown below. Based on the sample data and the regression line, complete the following. (a)For these data, current stock prices that are less than the mean of the current stock prices tend to be paired with values for earnings per share that are ▼(Choose one) the mean of the values for earnings per share. (b)According to the regression equation, for an increase of one dollar in earnings per share, there is a…
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