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 rate the 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), somewhat satisfied (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 the survey results follow (AAII website, February 7, 2012). Brokerage Speed Satisfaction Scottrade, Inc. 2.7 2.8 Charles Schwab 3.9 4.0 Fidelity Brokerage Services 3.0 3.5 TD Ameritrade 2.8 2.5 E*Trade Financial 2.7 3.1 Vanguard Brokerage Services 2.9 2.5 USAA Brokerage Services 3.0 3.5 Thinkorswim 2.8 2.3 Wells Fargo Investments 2.6 2.1 Interactive Brokers 3.3 2.8 Zecco.com 3.2 3.0 a. Select a scatter diagram for these data with the speed of execution as the independent variable. (A, B, C, D) b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates a (negative, positive) 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. Satisfaction= _+_ (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, decrease) in the speed of execution rating will increase the overall satisfaction rating by approximately __ points (to 1 decimal). 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 2.6 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?

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 rate the 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), somewhat satisfied (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 the survey results follow (AAII website, February 7, 2012). Brokerage Speed Satisfaction Scottrade, Inc. 2.7 2.8 Charles Schwab 3.9 4.0 Fidelity Brokerage Services 3.0 3.5 TD Ameritrade 2.8 2.5 E*Trade Financial 2.7 3.1 Vanguard Brokerage Services 2.9 2.5 USAA Brokerage Services 3.0 3.5 Thinkorswim 2.8 2.3 Wells Fargo Investments 2.6 2.1 Interactive Brokers 3.3 2.8 Zecco.com 3.2 3.0 a. Select a scatter diagram for these data with the speed of execution as the independent variable. (A, B, C, D) b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates a (negative, positive) 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. Satisfaction= _+_ (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, decrease) in the speed of execution rating will increase the overall satisfaction rating by approximately points (to 1 decimal). 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 2.6 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?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Brokerage	Speed	Satisfaction
Scottrade, Inc.	2.7	2.8
Charles Schwab	3.9	4.0
Fidelity Brokerage Services	3.0	3.5
TD Ameritrade	2.8	2.5
E*Trade Financial	2.7	3.1
Vanguard Brokerage Services	2.9	2.5
USAA Brokerage Services	3.0	3.5
Thinkorswim	2.8	2.3
Wells Fargo Investments	2.6	2.1
Interactive Brokers	3.3	2.8
Zecco.com	3.2	3.0

a. Select a scatter diagram for these data with the speed of execution as the independent variable. (A, B, C, D)

b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?

The scatter diagram indicates a (negative, positive) 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.

Satisfaction= _+_ (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, decrease) in the speed of execution rating will increase the overall satisfaction rating by approximately __ points (to 1 decimal).

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 2.6 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)

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 rate the 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), somewhat satisfied (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 the survey results follow (AAII website, February 7, 2012).
Brokerage
Speed
Satisfaction
Scottrade, Inc.
2.7
2.8
Charles Schwab
3.9
4.0
Fidelity Brokerage Services
3.0
3.5
TD Ameritrade
2.8
2.5
E*Trade Financial
2.7
3.1
Vanguard Brokerage Services
2.9
2.5
USAA Brokerage Services
3.0
3.5
Thinkorswim
2.8
2.3
Wells Fargo Investments
2.6
2.1
Interactive Brokers
3.3
2.8
Zecco.com
3.2
3.0
a. Select a scatter diagram for these data with the speed of execution as the independent variable.
А.
4.5
4.5-
3.5
3.5
3
2.5-
2.5
2.5
3
3.5
4
4.5
2.5
3.5
4
4.5
Speed of Exec ut ion
Speed of Exec ut ion
C.
D.
4.5
4.5
4-
2.5
2.5-
2.5
3
3.5
4.5
2.5
3
3.5
4.5
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
Select your answer - v 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.
Satisfaction =
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
Select your answer -
in the speed of execution rating will increase the overall satisfaction rating by
approximately
points (to 1 decimal).
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 2.6 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)
Satisfaction
Satisfaction
Satisfaction
Satisfaction

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