Arithmetic Mean and Five-step P-value Approach

A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labeled as 8 ounces, the company wants the packages to contain a mean of 8. 17 ounces so that virtually none of the packages contain less than 8 ounces. A sample of 50 packages is selected periodically, and the packaging process is stopped if there is evidence that the mean amount packaged is different from 8. 17 ounces. Suppose that in a particular of 50 packages, the mean amount dispensed is 8. 159 ounces, with a sample standard deviation of 0. 051 A. Is there evidence that the population mean amount is different from 8. 17 ounces? (Use a 0. 05 level of significance. ) B. Determine the p-value and interpret its meaning. 9. 27 In New York State, savings banks are permitted to sell a form of life insurance called savings bank life insurance (SLBI). The approval process consists of underwriting, which includes a review of the application, a medical information bureau check, possible requests for additional medical information and medical exams, and a policy complication stage in which the policy pages are generated and sent to the bank for delivery. The ability to deliver approved policies to customers in a timely manner is critical to the profitability of this service. During a period of one month, a random sample of 27 approved policies is selected, and the total processing time, in days, is recorded (and stored in insurance): 73 19 16 28 31 56 45 17 22 18 91 92 50 51 69 A. In the past, the mean processing time was 45 days. At the 0. 05 level of significance, is there evidence that the mean processing time had changed from 45 days? B. What assumption about the population distribution is needed in order to conduct the t test in (a)? C. Construct a boxplot or a normal probability plot to evaluate the assumption made in (b). D. Do you think that the assumption needed in order to conduct the t test in (a) is valid? Explain. 93. 1 One operation of a steel mill is to cut pieces of steel into parts that are used in the same frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts must be cut within Ð’Â ± 0. 005 inch of the length specified by the automobile company. The file Steel contains a sample of 100 steel parts. The measurement reported is the difference, in inches, between the actual length of the teel part, as measured by a laser measurement device, and the specified length of the steel part. For example, a value of -0. 002 represents a steel part that is 0. 002 inch shorter than the specified length. A. At the 0. 05 level of significance, is there evidence that the mean difference is not equal to 0. 0 inches? B. Construct a 95% confidence interval estimate of the population mean, Interpret this interval. C. Compare the conclusions reached in (a) and (b). D. Because n= 100, do you have to be concerned about the normally assumption needed for the t test and t interval? 9. 45 In recent year, the Federal Communications Commission reported that the mean wait for repairs for ATT customers was 25. 3 hours. In an effort to improve this service, suppose that a new repair service process was developed. This new process, used for a sample of 100 repairs, resulted in a sample mean of 22. 3 hours and a sample standard deviation of 8. 3 hours. A. Is there evidence that the population mean amount is less than 25. 3 hours? (Use a 0. 05 level of significance. ) B. Determine the p- value and interpret its meaning. 9. 47 You are the manager ot a restaurant that delivers pizza to college dormitory rooms. You have Just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A sample mean of 22. 4 minutes and a sample standard deviation of 6 minutes. A. Using the six- step critical value approach, at the 0. 05 level of significance, is there evidence that the population mean delivery time value of 25 minutes? B. At the 0. 05 level of significance, use the five-step p-value approach? C. Interpret the meaning of the p- value in (b). D. Compare your conclusions in (a) and (b). 9. 53 The U. S. Department of Education reports that 46% of full-time college students are employed while attending college (data extracted from The Condition of Education 2009, National Center for Education Statistics, nces. ed. gov). A recent survey of 60 full-time students at Miami University found that 29 were employed. A. Use the five- step p-value approach to hypothesis testing and a 0. 05 level of significance to determine whether the proportion of full-time students at Miami University is different that the national norm of 0. 6. B. Assume that the study found that 36 of the 60 full-time students were employed and repeat (a). Are the conclusions the same? 9. 55 One of the issues facing organizations is increasing diversity throughout the organization. One of the ways to evaluate an organizations success at increasing diversity is to compare the percentage of employees in the organization in a particular position with a specific background to the percentage in a position with that specific background in the general workforce. Recently, a large academic medical center determined that 9 of 17 employees in a particular position were female, whereas 55% of the employees for this position in the general workforce were female. At the 0. 05 level of significance, is there evidence that the proportion of females in this position at this medical center is different from what would be expected in the general workforce? 9. 57 One of the biggest issues facing e-retailers is the ability to reduce the proportion of customers who cancel their transaction after they have selected their products. It has been estimated that about half of prospective customers cancel their transactions after they have selected their products (data extracted from B. Tedeschi, E- Commerce, a Cure for Abandoned Shopping Carts: A Web Checkout System That Eliminates the Need for Multiple Screens, The New York Times, February 14, 2005, p. C3). Suppose that a company changed its Web site so that customers could use a single page checkout process rather than multiple pages. A sample of 500 customers who had selected their products were provided with the new checkout system.

Art Review Essay Example | Topics and Well Written Essays - 500 words - 1

Art Review - Essay Example   Exhibition Pictures in SCAD Museum  Alex Prager is one of the renowned artists in California. Being an inspired lady she believed in taking still photographs and presenting them in different famous world museums. Between July 27, 2013, to December 2013, Prager unveiled still art and pictures of emotionally charged and seductive worlds to SCAD Museum.This became one of the first admired exhibitions in South East for the Los Angeles.She used the charming and the disturbing still and saturated images to capture the attentions of the viewers.These ever leaves the viewers in suspense wondering which kind of narratives and art knowledge she had (Prager, 2012).Mambo’s WorksPortrait of Artists  In 1984, Mambo started his paintings as a project; he used screen printing in most of his fashions and T-shirts. Mambo is one of the most dedicated artists who with other artists paint a collection of appealing arts shown in most of the National Galleries. In his 30 years of artwork, he managed to come up with exhibitions with the quiet number of fashions from more than 250 artists. In the late eighties and Nineties, Mambo painted a portrait of artists, landscapes with their blue skies and placed them on t-shirts for fashions shows. In 1986, Chris O’Doherty, Mambos artistic friend, decided to join his renowned Australian design marked Mambo, they could create appealing street images for fashion shows, labels, and t-shirts.Australian Jesus at the Football

Contractual Agreements Vs Joint Ventures Assignment

Contractual Agreements Vs Joint Ventures - Assignment Example This paper refers to the R&D programs with inter-firm co-operation. The modes could be either contractual or through joint ventures. The basic objective behind these methods is to ensure cost-economization and strategic intent. R&D implies the standard activity of research oriented development wherein techno-scientific knowledge is applied to create newer procedures and products. The crux is that organizations benefit in the long run through R&D efforts and they need to plan for such activities to foster creation of better processes and products. R&D partnerships form a part of diverse relationships which two unrelated companies entertain through acquisitions or mergers. Different kinds of taxonomies got inter-twined in such understandings and they are now inseparable. The inter-dependency could be charted in any of the following ways of: †¢ Licensing & cross licensing: The service providers collect fee for the technological enhancement provided to their partner and sometimes swap knowledge instead of fee for cross-licensing. †¢ Second-sourcing ratifies reproduction of already existing products with specifications. †¢ Sub-contracting of one firm by the other establishes the customer-supplier relationship usually for long-term contracts. †¢ Joint funded R&D programs are usually contractual in nature wherein firms co-operate to perform such activities. †¢ Joint ventures combine the interests of two firms on a profit sharing basis. Sometimes firms with specific objectives related to different functions including R&D stipulate guidelines for performance of those functions smoothly. This paper refers to the R&D programs with inter-firm co-operation (IV & V points listed above). The modes could be either contractual or through joint ventures. The basic objective behind these methods is to ensure cost-economization and strategic intent. General trends in R&D dependency: The MERIT-CATI list which surveys the trend of R&D dependency establishes the following results: 1960s witnessed a relatively low number of such collaborations with a gradual increase towards the end from 10 a year to 30 a year. 1970’s continued the 30 a year trend and graduated to 50 a year partnerships till the middle only to increase three-folds to around 160 a year by the decade end. 1980s are earmarked for 200 and above inter-firm partnerships in the inception and galloping further to 500 a year till its end. The first two years of 1990s slowed down the pace to 350 to 400 alliances a year but later rose to 700 odd partnerships only to set off again to 500 per year till the end. Though, there is a slowdown in the late 90s, the number of partnerships, however, is far higher than the level of partnerships activated in the early 1960s. These alliances are also circular in nature that when they decrease, they tend to increase cyclically. The notable factor is the number of joint venture (JV) collaborations vis-a-vis contractual agreements in such R&D partnerships. In 1960’s when there were meager number of R&D partnerships, most of them were entered through JV’s. Till the mid of 1970’s around 70% of the total agreements were done through the JV route and 30% of them were through contracts. However, in the early 80’s this range slowed down to 40% giving bigger hand to contractual