Math 119 11

“Business Ethics is the application of ethical and moral principles or in a business environment. It deals with what is right and what wrong while doing business”. But to the contrary, evidences show that some business organizations are involved in different unethical practices to increase their profit at the risk of many people’s money, health and lives. As a business ethics student you are required to address the following questions: Describe five unethical practices adopted by business organizations in Oman. You may find it form newspapers, magazines etc. or from your own experiences and observation if any. And Analyze each of these unethical practices and explain how these unethical practices affect the people and society as a whole. And Suggest the ways to overcome each of these unethical practices.

2. Based on past records, it is generally believed that on an average, a typical University of Technology and Applied Sciences, Nizwa student spends about 25 hours in the LRC per week. Recently, the library has been shifted to a new location which is further away from the academic block. As a result, the administration feels that students may be spending less time in the library. Accordingly a random sample of 41 students were selected and the average number of hours they spend in the library came out to be 16.78 with a standard deviation of 5.17. Carry out an appropriate test of hypotheses for the above problem to test whether the shifting of the library has adversely impacted the study time in the population of all students. (You may assume that study times/week approximately follow a normal distribution in the population).

Problem is given: Out of a total number of 10,000 candidates who applied for jobs in a government department, 6,854 were males, 3,146 were graduates and others, non-graduates. The number of candidates with some experience was 2,623 of whom 1,860 were males. The number of male graduates was 2,012. The number of graduates with experience was 1,093 that includes 323 females?

7. Some years ago, a new brand of toothpaste was introduced in the United States. According to its advertisements, studies showed that it had "considerable success" in improving the health of a person's teeth. Suppose that these studies were designed in the following way. The manufacturer of this toothpaste chose three samples of seven people; the first sample agreed to use the new brand, the second sample used Brand A, and the third sample used Brand B. After six months, a dentist examined each person's teeth and scored the health of his or her teeth on a scale of 0 (lowest possible score) to 100 (highest possible score). The results were as follows: New Brand Brand A Brand B 65 58 54 71 60 38 53 63 43 55 90 61 34 95 94 82 89 96 77 62 82 The manufacturer of the new toothpaste says that the average score for the new brand is 2 points higher than for Brand A and 4 points higher than for Brand B. Would you agree with the manufacturer's advertisements? Explain.

In 2009 a survey found these airline preferences for people in Southeast Asia when choosing to fly to China: 40%, Thai Airlines; 41%, Singapore Airlines; and 19%, Cathay Pacific. In 2011 this survey was repeated, and from a sample of 1,000 responders, 365 chose Thai, 540 chose Singapore, and 95 selected Cathay Pacific. Can you conclude that the consumers still have the same purchase patterns?

A CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. If we randomly select one of the adults who participated in this study, compute: (round to four decimal places)a.P(affiliated with neither party) = b.P(better) = c.P(better|affiliated with neither party) = d.P(affiliated with neither party|better) = e.P(affiliated with neither party and better) =

Question: In two large populations, there are 30 and 25 per cent respectively of blue-eyed people. Is this difference likely to be hidden in samples of 1,200 and 900 respectively from the two populations ?

Об. A survey was conducted in which 100 males and, independently, 100 females were asked about their respective methods of transportation to work. Participants were asked whether they typically drive to work, use public transportation, or walk / bicycle. The results are given in the table below. Can the investigators conclude that males differ from females in their work commute tendencies? Show your work. Drive Public Transportation Walk or Bicycle 22 Females 71 Males 76 18 6 (a) Based on the assumption that female and male tendencies are alike, construct a table of expected frequencies. (b) Use a X² test to evaluate the assumption used in part a. Make sure you indicate which test you are using! (c) Interpret the result of part b in terms of the situation of the problem, without using any statistical language.

In June 2015, Gallup conducted a poll of a random sample of 14802 adults to determine the well-being of people living in the United States. One question asked, "Did you exercise at least 30 minutes for 3 or more days in the past week?" In the survey, 57.3% of males and 42.7% of females responded yes to this question. Which of the following is true about this scenario?A. 57:3% and 42.7% are both statistiesB. 57.3% and 42.7% are both parameter.C. If we took another random sample of 14802 adults, we would expect to get the exact same results.

A salesman for a new manufacturer of cellular phones claims not only that they cost the retailer less but also that the percentage of defective cellular phones found among his products, ( p1 ), will be no higher than the percentage of defectives found in a competitor's line, ( p2 ).  To test this statement, the retailer took a random sample of 130 of the salesman's cellular phones and 110 of the competitor's cellular phones.  The retailer found that 10 of the salesman's cellular phones and 5 of the competitor's cellular phones were defective.  Does the retailer have enough evidence to reject the salesman's claim?  Use a significance level of α=0.05 for the test. Step 5 of 6 :  Determine the decision rule for rejecting the null hypothesis H0 . Round the numerical portion of your answer to three decimal places.

Many parents allow underage children to drink alcohol in limited situations when an adult is present to supervise. The idea is that teens will learn responsible drinking habits if they first experience alcohol in a controlled environment. Other parents take a strict no-drinking approach. Researchers surveyed a sample of 200 students aged 14 to 17, about their alcohol use and about alcohol related problems. Using a=0.05, answer the questions No Alcohol related Problems Alcohol Related Problems Not allowed to drink 71 9 80 Allowed to drink 89 31 |120 160 40 N=200 What is the alternative hypothesis? [ Select] What is the null hypothesis? [ Select] What inferential test is being conducted? [ Select] What is the obtained statistic? [ Select ] What determines the critical value? [ Select ] What is the critical value? [ Select ] What is the decision rule? [ Select] What is your decision? [ Select] What is your conclusion? [ Select ]

The latest Gallup poll shows that 63 percent of Americans felt that the laws covering the sales of firearms should be made more strict, 29 percent felt that the laws should be less strict, and 7 percent felt that the laws should be less restrict. Suppose the survey were conducted among 2,000 individuals. i. What is the population for this survey? ii. What constitutes the sample?

A salesman for a new manufacturer of cellular phones claims not only that they cost the retailer less but also that the percentage of defective cellular phones found among his products, ( p1 ), will be no higher than the percentage of defectives found in a competitor's line, ( p2 ).  To test this statement, the retailer took a random sample of 185 of the salesman's cellular phones and 150 of the competitor's cellular phones.  The retailer found that 22 of the salesman's cellular phones and 11 of the competitor's cellular phones were defective.  Does the retailer have enough evidence to reject the salesman's claim?  Use a significance level of α=0.05 for the test. Step 1 of 6 :  State the null and alternative hypotheses for the test.

You are studying the effects of smoking by pregnant women on rates of asthma in their children. You collect data on the number of cigarettes smoked per day and whether or not the child developed asthma by the age of two. The data is below: Smoked 1-5 cigarettes per day --- 9.2% developed asthma Smoked 6-10 cigarettes per day --- 10.3% developed asthma Smoked 11-20 cigarettes per day -- 25% developed asthma Smoked 21-40 cigarettes per day --- 34.8% developed asthma Smoked 41-60 cigarettes per day --- 38.4% developed asthma In order to study the relationship between the number of cigarettes smoked by pregnant women per day and the percentage of their children developed asthma by the age of two using statistical knowledge, we convert the above data into the following format and see if we can obtain an adequate fit using linear regression. Average number of cigarettes smoked per day 3 8 Percentage of children developed asthma What is the value of the correlation coefficient? Г 15-5 30.5…

A researcher investigated whether a father's level of optimism was predictive of his son's optimism as a young adult. Twenty (20) fathers and sons who agreed to participate in the study were administered a scale measuring their current level of optimism (the scale ranged from 10 to 50), with higher scores indicating greater optimism.

The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote.  Suppose that 450 employed persons and 477 unemployed persons are independently and randomly selected, and that 291 of the employed persons and 242 of the unemployed persons have registered to vote.  Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who have registered to vote?  Use a significance level of α=0.05 for the test. Step 1 of 6 :  State the null and alternative hypotheses for the test.

The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote.  Suppose that 450 employed persons and 477 unemployed persons are independently and randomly selected, and that 291 of the employed persons and 242 of the unemployed persons have registered to vote.  Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who have registered to vote?  Use a significance level of α=0.05 for the test. Step 4 of 6 :  Compute the value of the test statistic. Round your answer to two decimal places.

The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote.  Suppose that 450 employed persons and 477 unemployed persons are independently and randomly selected, and that 291 of the employed persons and 242 of the unemployed persons have registered to vote.  Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who have registered to vote?  Use a significance level of α=0.05 for the test. Step 3 of 6 :  Compute the weighted estimate of p, p‾ . Round your answer to three decimal places.

The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote.  Suppose that 450 employed persons and 477 unemployed persons are independently and randomly selected, and that 291 of the employed persons and 242 of the unemployed persons have registered to vote.  Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who have registered to vote?  Use a significance level of α=0.05 for the test. Step 2 of 6 :  Find the values of the two sample proportions, pˆ1 and pˆ2 . Round your answers to three decimal places.

A justification for job training programs is that they improve worker productivity. Suppose that you are asked to evaluate whethe r more job training makes workers more productive. However, rather than having data on individual workers, you have access to data on manufacturing firms in Ohio. In particular, for each firm, you have information on hours of job training per worker (training) and number of nondefective items produced per worker hour (output).(i) Carefully state the ceteris paribus thought experiment underlying this policy question.(ii) Does it seem likely that a firm’s decision to train its workers will be independent of worker characteristics? What are some of those measurable and unmeasurable worker characteristics?(iii) Name a factor other than worker characteristics that can affect worker productivity.(iv) If you find a positive correlation between output and training, would you have convincingly established that job training makes workers more productive? Explain

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 1 of 2 :  Suppose a sample of 1313 new car buyers is drawn. Of those sampled, 341 preferred foreign over domestic cars. Using the data, estimate the proportion of new car buyers who prefer foreign cars. Enter your answer as a fraction or a decimal number rounded to three decimal places.

7. A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below.

Q3. Please answer the fill-ins.

Rainbow Harbor Cruises charges $16/adult and $8/child for a round-trip ticket. The records show that, on a certain weekend, 900 took the cruise on Saturday and 1000 took the cruise on Sunday. The total receipts for Saturday were $12,800, and the total receipts for Sunday were $12,000. Determine how many adults and children took the cruise on Saturday and on Sunday. Saturday       adults     children Sunday       adults     children

The following are auditor judgments and attributes samplingresults for six populations. Assume large population sizes.1 2 3 4 5 6EPER (in percent) 2 1 1 0 3 8TER (in percent) 6 5 20 3 8 15ARO (in percent) 5 5 10 5 10 10Actual sample size 100 100 20 100 60 60Actual number of exceptions in the sample 2 4 1 0 1 8a. For each population, did the auditor select a smaller sample size than is indicatedby using the attributes sampling tables in Table 15-8 for determining sample size?Evaluate selecting either a larger or smaller size than those determined in the tables.b. Calculate the SER and CUER for each population.c. For which of the six populations should the sample results be consideredunacceptable? What options are available to the auditor?d. Why is analysis of the exceptions necessary even when the populations areconsidered acceptable?e. For the following terms, identify which is an audit decision, a nonstatistical estimatemade by the auditor, a sample result, and a statistical…

Investigators enrolled 2,100 women in a study and followed them monthly to determine the incidence rate of heart disease. After one month of the first period of observation, none had a new diagnosis of heart disease, but 100 had died. In the second observation period which lasted for three months, 1 had a new diagnosis of heart disease within 1 month, and another 99 died within 2 months. In the third observation period which lasted for four months, another 7 had new diagnoses of heart disease and 793 died within 2 months. Calculate the incidence rate of heart disease among this cohort. Express in 2 decimal places as number of new cases per 1,000 person-time.

The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 5 of 6 :  Determine the decision rule for rejecting the null hypothesis H0H0. Round the numerical portion of your answer to three decimal places.

Has the researcher tested for representativeness: comparing the sex distribution ofthe population and of respondents, for example, or their ages, ethnicity, education, orincome?

A counselor claims that a new method of conflict resolution is less prone to interruption than an old method. Prior experience suggest that clients interrupted each other average of an 10 times per session. A drug company claims that a single dose of a new drug relieves symptoms for a longer period of time than the current formulation. The current formu- lation relieves symptoms for eight hours, on average.  Americans gain an average of one pound per year as they age between the ages of 25 and 45. A public health campaign aims to decrease the amount of weight gained during this interval.