Will improving customer service result in higher stock prices for the companies providing the better service? "When a company'ssatisfaction score has improved over the prior year's results and is above the national average (currently 75.7), studies show itsshares have a good chance of outperforming the broad stock market in the long run." The following satisfaction scores of threecompanies for the 4th quarters of two previous years were obtained from the American Customer Satisfaction Index. Assume thatthe scores are based on a poll of 67 customers from each company. Because the polling has been done for several years, thestandard deviation can be assumed to equal 6 points in each case.CompanyYear 1 ScoreYear 2 ScoreRite Aid7375Expedia7275J.C. Penney7374a. For Rite Aid, is the increase in the satisfaction score from year 1 to year 2 statistically significant? Use a = .05 and nullhypothesis is Ho : H1 – 42 <0. What can you conclude?z value(to 2 decimals)p-value(to 4 decimals)The difference - Select your answer -|statistically significant.b. Can you conclude that the year 2 score for Rite Aid is above the national average of 75.7? Use a = .05 and null hypothesis isHọ : µ< 75.7. Enter negative value as negative number.z value(to 2 decimals)p-value(to 4 decimals)We - Select your answer -|that customer service has improved for Rite Aid.c. For Expedia, is the increase from year 1 to year 2 statistically significant? Use a = .05 and null hypothesis is Ho : H1 – 42 <0.z value(to 2 decimals)p-value(to 4 decimals)The differenceSelect your answer -statistically significant.d. When conducting a hypothesis test with the values given for the standard deviation, sample size, and a, how large must theincrease from Year 1 to Year 2 be for it to be statistically significant?(to 2 decimals)e. Use the result of part (d) to state whether the increase for J.C. Penney from year 1 to year 2 is statistically significant.The increaseSelect your answer -|statistically significant.

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Answered: will improving customer service result…

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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In order to determine a realistic price for a new product that a company wants to market the company’s research department selected 10 sites thought to have essentially identical sales potential and offered the product in each at a different price. The resulting sales are recorded in the accompanying table: Price ($) Sales ($1,000s) 15.00 15 15.50 14 16.00 16 16.50 9 17.00 12 17.50 10 18.00 8 18.50 9 19.00 6 19.50 5 b). Draw a scattergram of the above data using Minitab Does it seem that the two variables are somewhat related? If yes, how do they seem to be related?
The Springfield Daily Gazette has reported that the average salary for City of Springfield employees is $81,500. The Gazette is claiming that city employees’ salaries are too high, and many of the citizens (who pay the taxes to support the city) are upset. The city council has called a special meeting to discuss whether employee salaries should be cut by 10–15%. You have collected data on employee incomes for the city, as shown below. In a paragraph of at least five or six sentences, explain what the measures of central tendency and standard deviation tell about the income of city employees. Using this information, respond to city council members. Should employee salaries be reduced? Why or why not?City of Springfield Employee Income DataMean = $81,500Median = $35,000Mode = $35,000Standard Deviation = $147,367
The American Association of Individual Investors (AAII) 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 the survey results follow (AAII web site, February 7, 2012). Brokerage Satisfaction withTrade Price Satisfaction withSpeed of Execution Overall Satisfaction withElectronic Trades Scottrade, Inc. 3.4 3.4 3.5 Charles Schwab 3.2 3.3 3.4 Fidelity Brokerage Services 3.1 3.4 3.9 TD Ameritrade 2.9 3.6 3.7 E*Trade Financial 2.9 3.2 2.9 (Not listed) 2.5 3.2 2.7 Vanguard Brokerage…
The American Association of Individual Investors (AAII) 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 the survey results follow (AAII web site, February 7, 2012). Click on the datafile logo to reference the data. 4.0 1.0 2.0 (a) Develop an estimated regression equation using trade price and speed of execution to predict overall satisfaction…
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The medical community unanimously agrees on the health benefits of regular exercise, but are adults listening? During each of the past 15 years, a polling organization has surveyed americans about their exercise habits. In the most recent of these polls, slightly over half of all American adults reported that they exercise for 30 or more minutes at least three times per week. The following data show the percentages of adults who reported that they exercise for 30 or more minutes at least three times per week during each of the 15 years of this study. Year Percentage of Adults Who Exercise 30 or more minutes at least three times per week 1 41.1 2 45 3 47.2 4 45.6 5 46.5 6 44.4 7 47.7 8 49.9 9 48 10 49 11 50 12 52.2 13 50.7 14 54.5 15 52.3 Choose the correct time series plot. (i) (ii) (iii) (iv) Does a linear trend appear to be present? use simple linear regression to find the parameters for the line that minimizes MSE for…
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