Complete the following questions. Be sure to complete all part of each question.
ID: 3253924 • Letter: C
Question
Complete the following questions. Be sure to complete all part of each question. Remember to show your work, legibly, for possibility of partial credit. Submit homework online, typed or handwritten and scanned homeworks are acceptable. 1. Data from a study shows that social exclusion causes "real pain". That is, activity in an area of the brain that responds to physical pain goes up as distress from social exclusion goes up. A scatterplot shows a moderately strong linear relationship. Below is regression output from these data. a) What is the equation of the least-squares regression line for predicting brain activity from social distress score? b) Use the equation to predict brain activity for social distress score of 2.0. c) What percent the variation in brain activity among these subjects is explained by the straight-line relationship with social distress score? Regression Analysis:Brain versus Distress The regression equation is Brain =-0.125 + 0.0708 distress How strongly do physical characteristics of brothers and sisters associate? Here are data on the heights (in inches) of 8 adult pairs.Explanation / Answer
Q.1 (a) Equation of least squares line. It will be calculatedby taking value of coefficient from the given table
Brain Activity = -0.1248 + 0.070782 * Social Distress Score
(b) If social distress = 2.0
then Brain activity = -0.1248 + 0.070782 * 2 = 0.01676
(c) Here R - square = 77.1 % so 77.1% of thevariation in brain activity among these subjects is explianed by socal distresss score.