In an article in the Journal of Marketing, Bayus studied the differences between "early replacement buyers" and "late replacementbuyers" in making consumer durable good replacement purchases. Early replacement buyers are consumers who replace a productduring the early part of its lifetime, while late replacement buyers make replacement purchases late in the product's lifetime. Inparticular, Bayus studied automobile replacement purchases. Consumers who traded in cars with ages of zero to three years andmileages of no more than 35,000 miles were classified as early replacement buyers. Consumers who traded in cars with ages ofseven or more years and mileages of more than 73,000 miles were classified as late replacement buyers. Bayus compared the twogroups of buyers with respect to demographic variables such as income, education, age, and so forth. He also compared the twogroups with respect to the amount of search activity in the replacement purchase process. Variables compared included the number ofdealers visited, the time spent gathering information, and the time spent visiting dealers. Regard the sample of 500 late replacementbuyers for which o = .71. How large a sample of late replacement buyers is needed to make us (Round up your answers to the nextwhole number.):(a) 99 percent confident that, the sample mean number of dealers visited, is within a margin of error of .04 of µ, the population mean number of dealers visited?nbuyers(b) 99.73 percent confident thatis within a margin of error of .05 of u?nbuyers

a). Given: σ=0.71E=margin of error=0.04 We know for 99% confidence level, the z-score is 2.58. The…

ne early part of its lifetime, while late replaCement buyers make replacement purchases late in the products Iifetime. In ar, Bayus studied automobile replacement purchases. Consumers who traded in cars with ages of zero to three years and s of no more than 35,000 miles were classified as early replacement buyers. Consumers who traded in cars with ages of r more years and mileages of more than 73,000 miles were classified as late replacement buyers. Bayus compared the two of buyers with respect to demographic variables such as income, education, age, and so forth. He also compared the two with respect to the amount of search activity in the replacement purchase process. Variables compared included the number of visited, the time spent gathering information, and the time spent visiting dealers. Regard the sample of 500 late replacement Ffor which o = .71. How large a sample of late replacement buyers is needed to make us (Round up your answers to the next umber.): ercent confident that mple mean number of dealers visited, is within a margin of error of .04 of u, the population mean number of dealers visited? buyers

ne early part of its lifetime, while late replaCement buyers make replacement purchases late in the products Iifetime. In ar, Bayus studied automobile replacement purchases. Consumers who traded in cars with ages of zero to three years and s of no more than 35,000 miles were classified as early replacement buyers. Consumers who traded in cars with ages of r more years and mileages of more than 73,000 miles were classified as late replacement buyers. Bayus compared the two of buyers with respect to demographic variables such as income, education, age, and so forth. He also compared the two with respect to the amount of search activity in the replacement purchase process. Variables compared included the number of visited, the time spent gathering information, and the time spent visiting dealers. Regard the sample of 500 late replacement Ffor which o = .71. How large a sample of late replacement buyers is needed to make us (Round up your answers to the next umber.): ercent confident that mple mean number of dealers visited, is within a margin of error of .04 of u, the population mean number of dealers visited? buyers

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 an article in the Journal of Marketing, Bayus studied the differences between "early replacement buyers" and "late replacement buyers" in making consumer durable good replacement purchases. Early replacement buyers are consumers who replace a product during the early part of its lifetime, while late replacement buyers make replacement purchases late in the product's lifetime. In particular, Bayus studied automobile replacement purchases. Consumers who traded in cars with ages of zero to three years and mileages of no more than 35,000 miles were classified as early replacement buyers. Consumers who traded in cars with ages of seven or more years and mileages of more than 73,000 miles were classified as late replacement buyers. Bayus compared the two groups of buyers with respect to demographic variables such as income, education, age, and so forth. He also compared the two groups with respect to the amount of search activity in the replacement purchase process. Variables compared…
In a study reported in the July 2007 issue of the Journal of Epidemiology and Community Health, researchers investigated whether veterans are more likely to commit suicide than nonveterans. They spent 12 years following 104,000 veterans who had served in the armed forces between 1917 and 1994, and compared them with 216,000 nonveterans. They found that 197 veterans and 311 nonveterans committed suicide. Q: How many times more times is a veteran likely to commit suicide than a nonveteran? Round all values to 3 decimal places. Show as much work as possible.
Do Left-Handers Die Earlier? According to a study published in the Journal of the American Public Health Association, lefthanded people do not die at an earlier age than right-handed people, contrary to the conclusion of a highly publicized report done 2 years earlier. The investigation involved a 6-year study of 3800 people in East Boston older than age 65. Researchers at Harvard University and the National Institute of Aging found that the “lefties” and “righties” died at exactly the same rate. “There was no difference, period,” said Dr. J. Guralnik, an epidemiologist at the institute and one of the coauthors of the report.
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2. A researcher is interested in the relationship between arousal and memory recall. Arousal will be manipulated by giving participants an injection of adrenaline at doses of 0 (control), 1, 5 or 10 mg/kg. Ten participants are randomly assigned to each dose group. Immediately after injection subjects are shown a list of 50 words to remember. The next day the participants return to the lab where they are given a free recall test. The number of words correctly recalled were recorded. Based on the results shown below, what can you conclude about the effects of arousal on memory? Set a = .05. 0 M = 21.8 a. State hypotheses: Dose of adrenaline (mg/kg) 1 5 M = 19.2 M = 31.2 b. Set criterion for making a decision about Ho: 10 M = 18.6
C8. According to the Pew Research Center (2015), recent immigrants are better educated than earlier immigrants to the United States. The change was attributed to the availability of better education in each region or country of origin. The percentage of immigrants 25 years of age and older who completed at least high school is reported in this table for 1970 to 2013. Write a statement describing the change over time in the percentage who completed at least a high school degree. 1970 1980 1990 2000 2013 Mexico 14 17 26 30 48 Other Central/South America 57 53 60 66 Asia 75 72 75 82 84 48 68 81 87 95 Europe 36 48 52 58 72 Caribbean 81 91 88 85 85 Africa Source: Pew Research Center, Modern Immigration Wave Brings 59 Million to U.S., Driving Population Growth and Change Through 2065, 2015. Retrieved from https://www.pewresearch.org/hispanic/2015/09/28/modern- immigration-wave-brings-59-million-to-u-s-driving-population-growth-and-change-through-2065/ 52
The MAKSI FEB UI program is considering buying a copier machine among 5 (five) types, namely the FC1, FC2, FC3, FC4 and FC5 types, where each type has different efficiency in terms of the speed of the number of pages (sheets) copied in one minute. Six staff members conducted an experiment to run each type of copier. The following data shows the number of copied pages (sheets) that can be produced in one minute according to the type of copier, 1 trial, and according to the staff assigned to run each type of copier: FC1 FC2 FC3 FC4 FC5 Staff 1 60 50 63 60 64 Staff 2 56 55 65 58 60 Staff 3 54 56 65 56 58 Staff 4 56 57 67 65 60 Staff 5 54 56 65 60 60 Staff 6 55 52 58 60 55 Some of the results of the calculation of the sum of squares (sum-square) and the average squared (mean square) required for the ANOVA test are provided in the following table: Source of Variation SS Df MS Fstat FTable CopierMachine 333.33 ……… ……… ……… ……… Staff ……….. ……… ……… ……… ……… Error 129.47 ……… ……… Total 532.67 …………
TABLE 2.5 Student teachers are trained to develop lesson plans, on the assumption that the writ- ten plan will help them to perform successfully in the classroom. In a study to assess the relationship between written lesson plans and their implementation in the class- room, 25 lesson plans were scored on a scale of 0 to 34 according to a Lesson Plan Assessment Checklist. The 25 scores are shown in Table 2.5. Use Tchebysheff's The- orem and the Empirical Rule (if applicable) to describe the distribution of these assessment scores. Lesson Plan Assessment Scores 26.1 26.0 14.5 29.3 19.7 22.1 21.2 26.6 31.9 25.0 15.9 20.8 20.2 17.8 13.3 25.6 26.5 15.7 22.1 13.8 29.0 21.3 23.5 22.1 10.2
A cohort study is conducted to assess the association between clinical characteristic and the risk of stroke. The study involves n-1,250 participants who are free of stroke at the study start. Each participant is assessed at study start (baseline) and every year thereafter for five years. The following table displays data on hypertension status measured at baseline and hypertension status measured two years later. 1. s 2 Years: Not Hvpertensive 850 45 2 Years: Hypertensive 148 207 Baseline: Not Hvpertensive Baseline: Hypertensive Compute the prevalence of hypertension at baseline Prevalence - Compute the prevalence of hvpertension at 2 vears. Prevalence - Compute the cumulative incidence of hypertension over 2 years. Incidence
To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study in which four participants were instructed to count sheep (the Sheep Condition), four were told to concentrate on their breathing (the Breathing Condition), and four were not given any special instructions. The average number of minutes taken for each participant to fall asleep over the next seven days were 14, 28, 27, and 31 minutes for the Sheep condition; 25, 22, 17, and 14 minutes for those in the Breathing condition; and 45, 33, 30, and 41 for the Control condition. Using the .05 significance level, did the different techniques have different effects? Restate the question as a research hypothesis and a null hypothesis about the populations.
The effects of social skill training on a 29 year-old mentally retarded male adult were explored. The subject listened to typical social situations (such as getting a compliment or saying thank you) on audiotape and discussed the situations with a therapist. The subject's positive social verbal interactions were counted before the training, at three times during the training period, and at three times after the training had been completed. All counts were taken by observing the subject at a evening recreation time in the subject's group home. Results show that positive interactions increased during the training period but then rapidly decreased after training had stopped. Independent variable (construct): Levels (operational def): Organismic/Manipulated: B/W or W/I: Dependent variable (Construct & Operational def): Type of Hypothesis: Type of Statistic: Research Design:
2. An article in the journal Applied Nutritional Investigation reported the results of a comparison of two different weight-loss programs (Liao, 2007). In the study, obese participants were randomly assigned to one of two groups and the percent of body fat loss was recorded. The soy group, a low-calorie group that ate only soy-based proteins (M= 3.1, s=0.55), while the traditional group, a low-calorie group that received 2/3 of their protein from animal products and 1/3 from plant products (M= 1.9, s=0.45). If sm1-M2 = 0.24, s²pooled = 0.25, n1 = 8, n2 = 10 is there a difference between the two diets. Use alpha of .05 and a two-tailed test to complete the 4 steps of hypothesis testing.