Business Statistics: A First Course (8th Edition)
8th Edition
ISBN: 9780135177785
Author: David M. Levine, Kathryn A. Szabat, David F. Stephan
Publisher: PEARSON
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An investors association's on-line discount broker survey polls members on their experiences with electronic trades handled by discount brokers. As part of the survey, members were asked to rate their satisfaction with the trade price and the speed of execution, as well as provide an overall satisfaction rating. 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 computing a weighted average of the scores provided by each respondent. A portion of the survey results follow. (Let x1 represent satisfaction with trade price, x2 represent satisfaction with speed of execution, and y represent overall satisfaction with electronic trades.)
Brokerage
Satisfaction with Trade Price
Satisfaction with Speed of Execution
Overall Satisfaction with Electronic Trades
Brokerage 1
3.3
3.3
3.4
Brokerage 2
3.1
3.2
3.5
Brokerage 3
3.2
3.3
3.9
Brokerage 4
3.0
3.5
3.8…
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Compare and contrast the three types of responsibility centers. What is the best way to evaluate a manager's performance in each type of center? What is the problem with using only financial measures of performance?
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- Mr. William Profit is studying companies going public for the first time. He is particularly interested in the relationship between the size of the offering and the price per share. A sample of 15 companies that recently went public revealed the following information. Size Price Size Price ($ millions), per Share, ($ millions), per Share, Company x y Company x y 1 9.0 10.8 9 160.7 11.3 2 94.4 11.3 10 96.5 10.6 3 27.3 11.2 11 83.0 10.5 4 179.2 11.1 12 23.5 10.3 5 71.9 11.1 13 58.7 10.7 6 97.9 11.2 14 93.8 11.0 7 93.5 11.0 15 34.4 10.8 8 70.0 10.7 Click here for the Excel Data File a. Determine the regression equation. (Round your answers to 4 decimal places.) b-1. State the decision rule for 0.05 significance level: H0: β ≤ 0; H1: β > 0. (Round your answer to 3 decimal places.) b-2. Compute the value of the test statistic. (Round your…arrow_forwardPlease answer C, D, and E ASAP. Thank you.arrow_forwardAccording to Padgett Business Services, 20% of all small-business owners say the most important advice for starting a business is to prepare for long hours and hard work. Twenty-five percent say the most important advice is to have good financing ready. Nineteen percent say having a good plan is the most important advice; 18% say studying the industry is the most important advice; and 18% list other advice. Suppose 14 small business owners are contacted, and assume that the percentages hold for all small-business owners.a. What is the probability that none of the owners would say preparing for long hours and hard work is the most important advice?b. What is the probability that six or more owners would say preparing for long hours and hard work is the most important advice?c. What is the probability that exactly five owners would say having good financing ready is the most important advice?d. What is the expected number of owners who would say having a good plan is the most important…arrow_forward
- You may need to use the appropriate technology to answer this question. 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 O Ho: B₁ * 0 Ha: B₁: = 0 Ho: B₁ ≥ 0 Ha: B₁ <0 Ho: B₁: Ha: B₁ * 0 = 0 |Ọ Ho: Bo #0 Ha: Bo = 0 A Ho: Po = 0 Ha: Bo # 0 B с D E F G H I J K 3.4 3.3 3.4 3.6 3.2 3.8 3.8 2.6 2.7 4.0 2.5 3.5 3.6 3.9 These ratings data on x = the quality of the speed of execution and y = overall…arrow_forwardA poll uses responses to several questions to calculate a "Happiness" index that measures overall happiness. An article included the happiness index for the 7 years between 2008 and 2016. Also included in the article were the percentages of people who responded "somewhat agree" or "strongly agree" to the following statements. Statement 1 (happy with life) 1: At this time, I'm generally happy with my life. Statement 2 (won't benefit): I won't get much benefit from the things that I do anytime soon. Year 2008 2009 2010 2011 2013 2015 2016 Happiness Index 34 32 36 32 34 33 34 Happy with Life Statement (percentage somewhat or strongly agree) 80 79 80 79 81 80 86 Won't Benefit Statement (percentage somewhat or strongly agree) 33 41 33 39 41 37 38 (a) Calculate the value of the correlation coefficient for Happiness index and the response to the Happy with life statement. (Round your answer to four decimal places.) (b) Calculate the value of the correlation coefficient for Happiness index and…arrow_forwardA poll uses responses to several questions to calculate a "Happiness" index that measures overall happiness. An article included the happiness index for the 7 years between 2008 and 2016. Also included in the article were the percentages of people who responded "somewhat agree" or "strongly agree" to the following statements. Statement 1 (happy with life) 1: At this time, I'm generally happy with my life. Statement 2 (won't benefit): I won't get much benefit from the things that I do anytime soon. Year 2008 2009 2010 2011 2013 2015 2016 Happiness Index 32 34 34 36 32 35 30 Happy with Life Statement (percentage somewhat or strongly agree) 78 81 78 83 79 82 82 Won't Benefit Statement (percentage somewhat or strongly agree) 35 39 35 35 43 35 42 (a) Calculate the value of the correlation coefficient for Happiness index and the response to the Happy with life statement. (Round your answer to four decimal places.) (b) Calculate the value of the correlation coefficient for Happiness index and…arrow_forward
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