G H Use the area below to draw a scatter diagram. A B C D E Scottrade, Inc. Charles Schwab TD Ameritrade E'Trade Financial 12345674901234 Vanguard Brokerage Services 8 USAA Brokerage Services Thinkorswim 10 Wells Fargo Investments Interactive Brokers 12 Zecco.com Brokerage Speed Satisfaction Part a. 3.5 3.3 Fidelity Brokerage Services 3332232242 3.2 3.3 3.8 3.3 3.6 3.4 2.8 3.1 2.7 3.8 3.7 3.6 2.6 2.6 2.2 2.7 4.1 3.9 2.5 2.3 3341866793 3333332232 14 15 16 17 18 19 20 21 23 225 Part c. Slope Intercept Formula #N/A #N/A b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates a rating for electronic trades. linear relationship between c. Develop the least squares estimated regression equation. Satisfaction= + Speed (to 3 decimals) speed of execution rating and yoverall satisfaction d. Provide an interpretation for the slope of the estimated regression equation (to 3 decimals). The slope of the estimated regression line is approximately will increase the overall satisfaction rating by approximately So, a one unit points. in the speed of execution rating e. Suppose Wells Fargo Investments developed new software 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 2.2 to the average speed of execution rating for the other 10 brokerage firms that were surveyed, what value would you predict for the overall satisfaction rating? (to 3 decimals)