Assume that a local garment manufacturer has 2,700 employees. manager then decides to obtain the employees' feedback on performance to provide a better working environment for them. The man sample only 300 employees because of time constraint. i) State the population and sampling frame for the study. ii) Suggest the best data collection method for this study and disadvantage of using the method mentioned
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- Consider that Roane county, which calculated that the average firm size (in terms of number of employees) is 150 with a median size of 50, while Anderson county calculated an average and median size of 230 and 255 respectively. Officials from both counties are asking their state legislatures for additional funds to accommodate their growing business size. Do you support their requests, why or why not? Also, are there any additional statistics you might ask for and why?California insurance companies wanted to study factors (e.g., the proximity to a major earthquake fault line) that may influence homeowners’ decisions to purchase earthquake insurance. Surveys were mailed to randomly selected households in three California counties to investigate the possible proximity effect. The data collected are shown below: Los Angeles San Bernardino Santa Clara sample size 1,000 1,400 1,200 Number with 377 469 390 earthquake insurance Los Angeles County is located closest among the three to a major earthquake fault line. Are homeowners in Los Angeles County more likely to purchase earthquake insurance than those in San Bernardino County? Test using α = 0.05. (Optional) Are homeowners in Los Angeles County more likely to purchase earthquake insurance than those in Santa Clara County? Use α = 0.05.There is a looming crisis in universities and colleges across North America. In most places enrollments are increasing requiring more instructors. However, there are not enough PhDs to fill the vacancies now. Moreover, among current professors, a large proportion are nearing retirement age. On top of these problems, some universities allow professors over the age of 60 to retire early. To help devise a plan to deal with the crisis, a consultant surveyed 521 55- to 64-year-old professors and asked each whether he or she intended to retire before 65. The responses are 1=No and 2=Yes. Estimate with 95% confidence the proportion of professors who plan on early retirement. ONLY USE EXCEL AND PLEASE SHOW ALL STEPS AND EXCEL COMMANDS. Retire Salary Faculty 1 43121 1 2 147687 3 1 78095 3 1 142943 3 2 119180 3 1 93720 1 2 131749 3 1 141513 1 1 103314 1 1 76268 1 1 99985 2 1 96823 3 1 106815 4 1 83193 4 1 95199 1 1 92981 5 2 87842 3 1 92410 2 1 81149 3…
- A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in choosing whom to vote for in the 2012 presidential election (aarP Bulletin,March 2012).a. What is the sampled population for this study?b. Social Security and Medicare was cited as “very important” by 350 respondents.Estimate the proportion of the population of U.S. adults age 50 and over who believethis issue is very important.c. Education was cited as “very important” by 74% of the respondents. Estimate thenumber of respondents who believe this issue is very importantA sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in choosing whom to vote for in the 2012 presidential election (aarP Bulletin,March 2012).a. What is the sampled population for this study?b. Social Security and Medicare was cited as “very important” by 350 respondents.Estimate the proportion of the population of U.S. adults age 50 and over who believethis issue is very important.c. Education was cited as “very important” by 74% of the respondents. Estimate thenumber of respondents who believe this issue is very important.d. Job Growth was cited as “very important” by 354 respondents. Estimate the proportionof U.S. adults age 50 and over who believe job growth is very important.e. What is the target population for the inferences being made in parts (b) and (d)? Is itthe same as the sampled population you identified in part (a)? Suppose you later learnthat the sample was restricted to members of the American Association of RetiredPeople…A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in choosing whom to vote for in the 2012 presidential election (aarP Bulletin,March 2012).a. What is the sampled population for this study?b. Social Security and Medicare was cited as “very important” by 350 respondents.Estimate the proportion of the population of U.S. adults age 50 and over who believethis issue is very important.c. Education was cited as “very important” by 74% of the respondents. Estimate thenumber of respondents who believe this issue is very important.d. Job Growth was cited as “very important” by 354 respondents. Estimate the proportionof U.S. adults age 50 and over who believe job growth is very important.
- Suppose that you want to compare the means of three populations by using the Tukey multiple-comparison procedure. If the sample sizes are 5, 6, and 6, determine the parameters for the appropriate q-curve.(a) What is the minimum sample size needed assuming that no prior information is available? (b) What is the minimum sample size needed using a prior study that found that 32% of the respondents said they think Congress is doing a good or excellent job? (c) How do the results from (a) and (b) compare? A. Having an estimate of the population proportion reduces the minimum sample size needed. B. Having an estimate of the population proportion has no effect on the minimum sample size needed. C. Having an estimate of the population proportion raises the minimum sample size needed.The Organisation for Economic Co-operation and Development (OECD) administered a random telephone survey during the day regarding the percentage of stay-at-home moms and dads in the typical household. What, if any, will be the most noticeable bias for this survey? There does not seem to be any bias. Nonresponse bias Undercoverage of the population Response bias Voluntary response bias
- The Bureau of Transportation reports on-time performance for airlines at major airports. JetBlue, United, and US Airways share Terminal C and Boston's Logan Airport. The percentage of on-time flights reported for a sample month were 76.8% for JetBlue, 71.5% for United, and 82.2% for US Airways. Assume that 30% of the arriving flights at this terminal are JetBlue flights, 32% are United flights, and 38% are US Airways flights. a. Develop a contingency table (table of joint probabilities and marginal probabilities). b. An announcement is made that Flight 1382 will arrive at Terminal C. What is the probability that the flight will arrive on time? c. Flight 1382 arrives on time. What is the probability that Flight 1382 is operated by US Airways? d. Flight 1382 will not arrive on time. What is the probability that Flight 1382 is operated by United?c please survey of 1000 adults from a certain region asked, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 58% of the females and 51% of the males answered window tinting. The sample sizes of males and females were not provided. Suppose that of 600 females, 348 reported window tinting as their preferred luxury upgrade of choice, while of 400 males, 204 reported window tinting as their preferred luxury upgrade of choice. Complete parts (a) through (d) below. a. Is there evidence of a difference between males and females in the proportion who said they prefer window tinting as a luxury upgrade at the 0.05 level of significance? State the null and alternative hypotheses, where π1 is the population proportion of females who said they prefer window tinting as a luxury upgrade and π2 is the population proportion of males who said they prefer window tinting as a…Calculate the standard error for the sampling distribution for average commute time of Californians. Part 1 and Part 2.