The American Association of Individual Investors (AAII) On-Line Discount Broker Survey polls members on their experiences with discount brokers. As part of the survey, members were asked to ratethe quality of the speed of execution with their broker as well as provide an overall satisfaction rating for electronic trades. Possible responses (scores) were no opinion (0), unsatisfied (1), somewhatsatisfied (2), satisfied (3), and very satisfied (4). For each broker summary scores were computed by calculating a weighted average of the scores provided by each respondent. A portion of thesurvey results follow (AAII website, February 7, 2012).BrokerageSpeedSatisfactionScottrade, Inc.2.93.0Charles Schwab2.42.2Fidelity Brokerage Services3.02.9TD Ameritrade2.42.4E*Trade Financial3.63.6Vanguard Brokerage Services3.53.8USAA Brokerage Services3.83.3Thinkorswim2.52.6Wells Fargo Investments2.62.6Interactive Brokers3.83.8Zecco.com3.83.4a. Select a scatter diagram for these data with the speed of execution as the independent variable.А.В.4.54.5-443.53.53.3.2.52.5-SatisfactionSatisfaction 2.533.544.52.53.544.5Speed of Exec ut ionSpeed of Exec ut ionС.D.4.54.5:3.53+3.2.52.52.533.544.52.53.544.5Speed of Exec utionSpeed of Exec ut ionSelect your answer -b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?The scatter diagram indicates apositive+ linear relationship between x =speed of execution rating and y = overall satisfaction rating for electronic trades.c. Develop the least squares estimated regression equation. Enter negative value as negative number.Satisfaction0.315 +0.878 Speed (to 4 decimals)d. Provide an interpretation for the slope of the estimated regression equation.The slope of the estimated regression line is approximately(to 4 decimals). So, a one unit increase+ in the speed of execution rating will increase the overallsatisfaction rating by approximatelypoints (to 1 decimal).e. Suppose TD Ameritrade 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 2.4 tothe average speed of execution rating for the other 10 brokerage firms that were surveyed, what value would you predict for the overall satisfaction rating?3.116 (to 3 decimals)Satisfaction4.Satisfaction

Speed of Exec ut ion Speed of Exec ut ion - Select your answer - b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates a positive : linear relationship between a = speed of execution rating and y = overall satisfaction rating for electronic trades. c. Develop the least squares estimated regression equation. Enter negative value as negative number. Satisfaction = 0.315 + 0.878 Speed (to 4 decimals) d. Provide an interpretation for the slope of the estimated regression equation. The slope of the estimated regression line is approximately (to 4 decimals). So, a one unit increase : in the speed of execution rating will increase the overall satisfaction rating by approximately points (to 1 decimal). e. Suppose TD Ameritrade 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 2.4 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? 2116 (te desimale)