The Coast Starlight Amtrak train that runs from Seattle to LosAngeles. The mean travel time from one
Question:
The Coast Starlight Amtrak train that runs from Seattle to LosAngeles. The mean travel time from one stop to the next on theCoast Starlight is 129 mins, with a standard deviation pf 113minutes. The mean distance traveled from one stop to the next is108 miles with a standard deviation of 99 miles. The correlationbetween travel time and distance is 0.636 a.) Write the equation ofthe regression line from predicting travel time. b.) Interpret theslope and the intercept in this context. c.) Calculate R2 of theregression line for predicting travel time from distance traveledfor the Coast Starlight, and interpret R2 in the context of theapplication. d.) The distance between Santa Barbara and Los Angelesis 103 miles. Use the model to estimate the time it takes for theStarlight to travel between two cities. e.) It usually takes theCoast Starlight about 168 mins to travel from Santa Barbara to LosAngeles. Calculate the residual and explain the meaning of thisresidual value. f.) Suppose Amtrak is considering adding a stop tothe Coast Starlight 500 miles away from Los Angeles. Would it beappropriate to use this linear model to predict the travel timefrom Los Angeles to tis point?
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry