Brokerage Speed Satisfaction Scottrade, Inc. 3.5 Charles Schwab 3.4 Fidelity Brokerage Services 34 3.9 TD Ameritrade 3.7 E.Trade Financial 3.2 2.9 Vanguard Brokerage Services 38 2.8 USAA Brokerage Services 3.8 3.6 Thinkorswim 2.6 2.6 Wells Fargo Investments 27 2.3 Interactive Brokers 40 4.0 Zecco.com 25 2.5 (a) Develop a scatter diagram for these data with the speed of execution as the Independent variable. 4.5 4.5 4.5 4.5 4.0 4.0 4.0 4.0 3.5 35 3.5 3.5 Satisfaction Satisfaction Satisfaction Satisfact 3.0 3.0 3.0 3.0 25 25 25 2.5 25 3.0 3.5 4.0 45 2.5 3.0 3.5 4.0 45 2.5 3.0 3.5 4.0 4.5 2.5 3.0 3.5 4.0 4.5 O Speed of Execution Speed of Execution Speed of Execution Speed of Execution (b) What does the scatter diagram developed In part (a) Indicate about the relationship between the two variables? The scatter diagram Indicates no notice ship between speed of execution rating and overall satisfaction rating for electronic trades. The scatter diagram Indicates a een speed of execution rating and overall satisfaction rating for electronic trades. O The scatter diagram Indicates a een speed of execution rating and overall satisfaction rating for electronic trades. (c) Develop the least squares estimated regression equation. (Round your numerical values to three decimal places.) 9 - (d) Provide an Interpretation for the slope of the estimated regression equation. The slope gives the speed of execution rating when the overall satisfaction rating is 0. The slope gives the change in the speed of execution rating for every one point Increase in the overall satisfaction rating. The slope gives the change in the speed of exec ion rating for every one point decrease in the overall satisfaction rating. The slope gives the change in the overall lon rating for every one point increase in the speed of execution rating. The slope gives the ove ction rating when the speed of e tion rating is o. (e) Suppose Wells Fargo Investments ware to increase their speed of execution rating. If the new software is able to Increase their speed of execution rating from the current value of 2.7 to the average speed of execution rating for the other 10 brokerage firms that wer