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Broker Satisfaction. 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)(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. 3.43.5 Charles Schwab 3.33.4 Fidelity Brokerage Services 3.43.9 TD Ameritrade 3.63.7 E*Trade Financial 3.22.9 Vanguard Brokerage Services 3.82.8 USAA Brokerage Services 3.83.6 Thinkorswim 2.62.6 Wells Fargo Investments 2.72.3 Interactive Brokers 4.04.0 Zecco.com 2.52.5\begin{array}{lcc}\text { Brokerage } & \text { Speed } & \text { Satisfaction } \\ \text { Scottrade, Inc. } & 3.4 & 3.5 \\ \text { Charles Schwab } & 3.3 & 3.4 \\ \text { Fidelity Brokerage Services } & 3.4 & 3.9 \\ \text { TD Ameritrade } & 3.6 & 3.7 \\ \text { E*Trade Financial } & 3.2 & 2.9 \\ \text { Vanguard Brokerage Services } & 3.8 & 2.8 \\ \text { USAA Brokerage Services } & 3.8 & 3.6 \\ \text { Thinkorswim } & 2.6 & 2.6 \\ \text { Wells Fargo Investments } & 2.7 & 2.3 \\ \text { Interactive Brokers } & 4.0 & 4.0 \\ \text { Zecco.com } & 2.5 & 2.5\end{array}

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

Question

Federal Employee Satisfaction. The United States Office of Personnel Management (OPM) manages the civil service of the federal government. Results from its annual Federal Employee Viewpoint Survey (FEVS) are used to measure employee satisfaction on several work aspects, including Job Satisfaction, Pay Satisfaction, Organization Satisfaction, and an overall measure of satisfaction referred to as Global Satisfaction. In each case a 100-point scale with higher values indicating greater satisfaction is used (OPM website). Scores for Global Satisfaction. Job Satisfaction, Pay Satisfaction, and Organization Satisfaction for a sample of 65 employees are provided in the file Satisfaction.

b. Predict the overall Global Satisfaction score for an employee with a Job Satisfaction score of 72, a Pay Satisfaction score of 54, and an Organization Satisfaction score of 53.

Solution

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In this exercise, we need to find the overall Global Satisfaction score for an employee with x1x_1 as 7272, x2x_2 as 5454, and x3x_3 as 5353. To do so, we will substitute the variables with their values in the equation we computed in part a).

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