What is capital budgeting? What are the differences between screening decisions and preference decisions?
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What is capital budgeting? What are the differences between screening decisions and preference decisions?
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- What is a sample space?Sociologists argued that women on average earn less than men as women often choose to work less hours. They further suggest that the choice of hours worked may be driven by various factors such as age, childcare needs, occupation choice and flexibility. To investigate the relation between hours worked and income earned by Australian men and women, a researcher plans to survey a sample of individuals across the country. Briefly explaina) What type of survey method the researcher could use and why? b) What sampling method could the researcher use to select his/her sample and why?c) What are the two main variables the researcher should consider collecting data for the purpose of the above analysis and why? Identify the data type(s) for the variables. d) What kind of issues the researcher may face in this data collection? Suppose a researcher has collected data from a sample of 65 individuals using the sampling method you have proposed in (b). For each individual, the hours worked per week…How to identify selection or participation bias in a study?
- Is the Stock Market Independent?The Standard and Poor 500 (S&P 500) is a weighted average of the stocks for 500 large companies in the United States. It is commonly used as a measure of the overall performance of the US stock market. Between January 1, 2009 and January 1, 2012, the S&P 500 increased for 423 of the 756 days that the stock market was open. We will investigate whether changes to the S&P 500 are independent from day to day. This is important, because if changes are not independent, we should be able to use the performance on the current day to help predict performance on the next day. (a) What is the probability that the S&P 500 increased on a randomly selected market day between January 1, 2009 and January 1, 2012?Round your answer to four decimal places. (b) If we assume that daily changes to the S&P 500 are independent, what is the probability that the S&P 500 increases for two consecutive days?Round your answer to four decimal…What decisions can be made on the basis of The Harris Poll survey that measures the reputations of the most visible companies in the United States?Although airline schedules and cost are important factors for business travelers when choosing an airline carrier, a uSa today survey found that business travelers list an airline’sfrequent flyer program as the most important factor. From a sample of n = 1993 businesstravelers who responded to the survey, 618 listed a frequent flyer program as the most important factor.a. What is the point estimate of the proportion of the population of business travelerswho believe a frequent flyer program is the most important factor when choosing anairline carrier?b. Develop a 95% confidence interval estimate of the population proportion.c. How large a sample would be required to report the margin of error of .01 at 95%confidence? Would you recommend that uSa today attempt to provide this degreeof precision? Why or why not?
- Is there any bias in the survey question? Explain What do you think would help students pay attention in class?Laura Naples, manager of Heritage Inn, periodically collects and tabulates information about a sample of the hotel’s overnight guests. This information aids her in pricing and scheduling decisions she must make. The table below lists data on 10 randomly selected hotel registrants, collected as the registrants checked out. The data listed are: Number of people in the group Hotel’s shuttle service used: yes or no Total telephone charges incurred Reason for stay: business or personal *Insert hw.png 1. Before cell telephones became so common, the average telephone charge per registered group was at least $5.00. Laura suspects that the average has dropped. Test H0: m > 5 and Ha: m < 5 using a .05 level of significance. Use both the critical value and p-value approaches to hypothesis testing. 2. In the past, Laura has made some important managerial decisions based on the assumption that the average number of people in a registered group is 2.5. Now she wonders if the assumption is…Author Cary McNeal Ben Mezrich Smith Gavin Menzies Charles C. Mann Adam Goodheart Dickens John Kennedy Toole Ernest Hemingway O Weight O NumPages O Height Thick Amazon Price 5.18 10.2 1.5 10.87 16.77 16.44 13.46 8.44 19.8 NumPages 304 273 96 672 720 460 336 405 304 Height 7.8 8.4 8.3 8.8 8 8.9 7.8 8.2 9.6 Thick 0.8 0.7 0.3 1.6 1.4 1.7 1.2 0.8 1.1 Weight (oz) 11.2 7.2 4 28.8 22.4 32 15.5 11.2 19.2
- Cybersecurity is a critical business issue that demands the attention of business and IT executives. According to a recent study, 67% of surveyed business and IT executives reported phishing scams at their institutions. Complete parts (a) and (b) below. a. If you conduct a follow-up study to estimate the population proportion of business and IT executives reporting phishing scams at their institutions, would you use a p of 0.67 or 0.50 in the sample size formula? OA. Use p=0.50 because this value will produce the greater sample size. ⒸB. Use p=0.67 because this value is an educated estimate of OC. Use p=0.50 because this value is an educated estimate of . OD. Use p=0.67 because this value will produce the greater sample size. b. Using your answer to (a), find the sample size necessary to estimate, with 90% confidence, the population proportion to within 10.04. The sample size needed is (Round up to the nearest integer.)Age and party 2008. The Pew Research Centercollected data from national exits polls conducted byNBC News after the 2008 presidential election. Thefollowing table shows information regarding voter ageand party preference: a) What sampling strategy do you think the pollstersused? Explain.b) What percentage of the people surveyed wereDemocrats? c) Do you think this is a good estimate of the percent-age of voters in the United States who are registered Democrats? Why or why not?d) In creating this sample design, what question do youthink the pollsters were trying to answer? Republican Democrat Other Total18–29 260 390 351 100130–44 320 379 300 99945–64 329 369 300 99865+ 361 392 251 1004Total 1270 1530 1202 4002Sociologists argued that women on average earn less than men as women often choose to work less hours. They further suggest that the choice of hours worked may be driven by various factors such as age, childcare needs, occupation choice and flexibility. To investigate the relation between hours worked and income earned by Australian men and women, a researcher plans to survey a sample of individuals across the country. Briefly explain a) What type of survey method the researcher could use and why? b) What sampling method could the researcher use to select his/her sample and why?c) What are the two main variables the researcher should consider collecting data for the purpose of the above analysis and why? Identify the data type(s) for the variables. d) What kind of issues the researcher may face in this data collection?Suppose a researcher has collected data from a sample of 65 individuals using the sampling method you have proposed in (b). For each individual, the hours worked per week…