A some association On-Line Discount Broker Survey polls memberson their experiences with discount brokers. As part of the survey,members were asked to rate the quality of the speed of executionwith their broker as well as provide an overall satisfaction ratingfor electronic trades. Possible responses (scores) were no opinion(0), unsatisfied (l), somewhat satisfied (2), satisfied (3), andvery satisfied (4). For each broker summary scores were computed bycalculating a weighted average of the scores provided by eachrespondent. A portion of the survey results follow

Brokerage	Speed	Satisfaction
Scottrade, Inc.	3.6	3.3
Charles Schwab	3.2	3.4
Fidelity Brokerage Services	3.7	3.8
TD Ameritrade	2.7	2.5
E*Trade Financial	3.8	3.3
Vanguard Brokerage Services	3.2	3.6
USAA Brokerage Services	3.8	3.9
Thinkorswim	2.7	2.9
Wells Fargo Investments	2.9	2.4
Interactive Brokers	3.9	3.4
Zecco.com	3.6	3.1

b. What does the scatter diagram developed in part (a) indicateabout the relationship between the two variables? The scatterdiagram indicates a _______ linear relationship between speed ofexecution rating and overall satisfaction rating for electronictrades.
c. Develop the least squares estimated regression equation. Enternegative value as negative number.
Satisfaction = ____ + ____ speed?
(to 4 decimals)

d. Provide an interpretation for the slope of the estimatedregression equation (to 4 decimals).
The slope of the estimated regression line is approximately ______.So, a one unit ________in the speed of execution rating willincrease the overall satisfaction rating byapproximately_______points.

e. Suppose Thinkorswim developed new software to increase theirspeed of execution rating. If the new software is able to increasetheir speed of execution rating from the current value of 2.7 tothe average speed of execution rating for the other 10 brokeragefirms that were surveyed, what value would you predict for theoverall satisfaction rating? ____________ (to 3 decimals)