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. Suppose a
portion of the survey results follow.
Brokerage
Speed
Satisfaction
A
3.4
3.5
B
3.3
3.5
C
3.4
3.9
D
3.6
3.5
E
3.2
2.9
F
3.8
2.8
G
3.8
3.6
H
2.6
2.7
I
2.7
2.3
J
4.0
4.0
K
2.5
2.5
1. WHATS THE MEAN SQ?
2. WHATS THE SUM OF SQ?