A restaurant chain would like to measure the proportion of customers who are generally satisfied with the serviceprovided by its staff. At the end of the meal, as the check is delivered to the table, the server asks those at the tableto rate their satisfaction with the service provided as "Very Satisfied," "Satisfied," or "Not Satisfied." During a one-week period, 147 customers were surveyed and 135 (93%) reported they were either Satisfied or Very Satisfied.How might the results be biased in obtaining an estimate of all customers who are satisfied with service?O Because of response bias, the survey results may overestimate the true proportion of satisfied customers.O Because of response bias, the survey results may underestimate the true proportion of satisfied customers.O Because of voluntary response bias, the survey results may overestimate the true proportion of satisfiedcustomers.O Because customers were surveyed overa one-week period, the results should provide an accurate estimate ofsatisfied customers.Mark this and returnSave and ExitNextSubrnit74五

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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 a study looking at undergraduate students’ perceptions of sense of community at their university, a researcher hypothesizes that the farther away students live from campus (in miles), the less they feel they are part of the university community. The researcher collected data for the following two variables – miles from campus and part of community (rating from 1-10 of how much they felt part of the university community). what is the scale of measurement? (i.e., nominal, ordinal, interval or ratio)
b. TripAdvisor is one of many online websites that provides ratings for hotels throughout the world. TripAdvisor uses a semi-automated telephone process to take reservations from its customers. This company conducts a survey of customers, asking them what problems they have encountered in making reservations. The chart below shows the analysis of the customer responses (BS = Busy Signal; TL = Too Long to Wait; GD = Got Disconnected; WP = Transferred to the Wrong Person). Problems Encountered Making Enquiries by Telephone 450 400 400 350 -300 250 200 175 150 100 50 50 25 0 BS TL GD WP Type of Complaint What percentage of customers encountered "Busy Signal" or "Too Long to Wait" when making reservations? Number of Complaints
A survey of Hoosiers found that 47%47% are Pacers fans, 54%54% are Colts fans, and 25%25% are Pacers fans but not Colts fans. What proportion of those surveyed are Colts fans but not Pacers fans?
A college professor conducted student evaluations at the end of a semester. One important question asked was, "Would you recommend this professor to a friend?” Fifty-four students responded using the following 1-to-5 rating scale. 1 = "absolutely not" 2 = "probably not” 3 = "no opinion" 4 = "probably yes" 5 = "absolutely yes" Student responses were recorded. "Blank" indicates that a student skipped this question on the evaluation. 4 #28: #1: Blank #10: #2: Blank #3: #4: Blank #5: #6: #7: #8: 4 #9: 5 4 5 2 # 11: #12: #13: #14: #15: # 16: #17: 3 Blank 5 Blank Blank 1 5 Blank # 19: #20: #21: #22: #23: #24: #25: #26: 4 #18: Blank #27: 1 2 #30: 1 #31: 3 Blank 5 #29: 5 Blank #32: #33: #34: #35: 1 #37: 5 Blank 4 1 5 4 5 #38: #39: #40: # 41: #42: #43: #44: #36: Blank #45: 2 #46: Blank 1 5 4 Blank #49: 5 #47: Blank #48: #50: #51: #52: Blank #53: 1 5 4 5 5 1 5 1 #54: Blank
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A business sent out a survey to it's customers in two groups; one under 30 years old (group 1) and one over 30 years old (group 2). Customers were asked if they preferred to purchase items online or in store. Out of 300 customers under 30 (group 1), 180 said that they purchased online. Out of 300 customers over 30 (group 2), 170 said that they purchased online. Is there a difference in the population proportion who purchased online? The business wanted to test the hypothesis Ho: P2 P1 O versus Ha: P2 - P₁ does not equal Ö. What is the p-value? Use JMP and round the p-value to two decimal places.
The school counselor needs to meet with students who have more than three absences. Here is some of the data about the students. Student name Homeroom teacher Absences Arianna Mr. Shea 4 Priyanka Ms. Hartley 4 Vivek Ms. Cowan 6 Suraj Mr. Rankin 5 Julia Ms. Andersen 6 ... ... ... The individuals in this data set are: Choose 1 answer: Choose 1 answer: (Choice A) A Homeroom teachers (Choice B) B School counselors (Choice C) C Students This data set contains: Choose 1 answer: Choose 1 answer: (Choice A) A 222 variables, 111 of which is quantitative (Choice B) B 222 variables, 222 of which are quantitative (Choice C) C 555 variables, 111 of which is quantitative (Choice D) D 555 variables, 333 of which are quantitative
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A sample of 200 college undergraduates was collected and the student’s gender and method of getting to class that day were collected. The data appears below. Gender Drive Bike Walk Total Male 95 10 10 115 Female 65 5 15 85 Total 160 15 25 200 What proportion of the students are both female and ride a bike to class?
The Condé Nast Traveler Gold List provides ratings for the top 20 small cruise ships. The data shown below are the scores each ship received based upon the results from Condé Nast Traveler's Annual Readers' Choice Survey. Each score represents the percentage of respondents who rated a ship as excellent or very good on several criteria, including Shore Excursions and Food/Dining. An overall score was also reported and used to rank the ships. The highest ranked ship, the Seabourn Odyssey, has an overall score of 94.4, the highest component of which is 97.8 for Food/Dining. Shore Ship Overall Food/Dining Excursions Seabourn Odyssey 94.4 90.9 97.8 Seabourn Pride 93.0 84.2 96.7 National Geographic Endeavor 92.9 100.0 88.5 Seabourn Sojourn 91.3 94.8 97.1 Paul Gauguin 90.5 87.9 91.2 Seabourn Legend 90.3 82.1 98.8 Seabourn Spirit 90.2 86.3 92.0 Silver Explorer 89.9 92.6 88.9 Silver Spirit 89.4 85.9 90.8 Seven Seas Navigator 89.2 83.3 90.5 Silver Whisperer 89.2 82.0 88.6 National Geographic…
A survey was conducted on unauthorized use of computer systems. One of the survey questions asked respondents to indicate the percentage of monetary losses attributable to malicious actions by individuals within the organization. The histogram below summarizes the data for the 121 firms who experienced some monetary loss due to malicious insider actions. a. Which measurement class contains the highest proportion of respondents? Answer 5 Question 1 b. What is the approximate proportion of the 121 organizations that reported a monetary loss (%) from malicious inside actions less than 20%? Answer 6 Question 1 c. What is the approximate proportion of the 121 organizations that reported a percentage monetary loss from malicious inside actions greater than 60%? Answer 7 Question 1
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