Before purchasing videoconferencing equipment, a company tested its current internal computer network. The tests measured how rapidly data moved through its network given the current demand on the network. Eighty files ranging in size from 20 to 100 megabytes (MB) were transmitted over the network at various times of day, and the time to send the files (in seconds) recorded. In the accompanying data, the time is given as the number of hours past 8 A. M. on the day of the test. Use the transfer time as the response, with the file size and time of day as explanatory variables.

Required:
a. Is the correlation between file size and transfer time significantly different from zero?
b. Estimate the average "setup" time to start the file transfer. This time is used to synchronize the computers making the transfer and is unrelated to file size. Provide an interval suitable for presenting.

Which of the following is most likely to lead to a general decrease in wages? a. elastic demand b. public goods c. an economic recovery d. immigration 2b2t

For many years, kellogg's frosted flakes, a ready-to-eat breakfast cereal, was perceived as a cereal for children. tony the tiger, a cartoon character, extolled frosted flakes, and advertisements depicted children enjoying the product with tony in competitive situations. recently, in response to declining sales of frosted flakes, the cereal maker has adopted a new series of advertisements that show adults admitting that they enjoy frosted flakes, too. kellogg's is attempting to

The amberssen specialty company is a chain of twelve retail stores that sell a variety of imported gift items, gourmet chocolates, cheeses, and wines in the toronto area. amberssen has an is staff of three people who have created a simple but effective information system of networked point-of-sale registers at the stores and a centralized accounting system at the company head- quarters. harry hilman, the head of amberssens is group, has just received the following memo from bill amberssen, sales director (and son of amberssen’s founder). harry—it’s time amberssen specialty launched itself on the internet. many of our competitors are already there, selling to customers without the expense of a retail storefront, and we should be there too. i project that we could double or triple our annual revenues by selling our products on the internet. i’d like to have this ready by - giving, in time for the prime holiday gift-shopping season. bill after pondering this memo for several days, harry scheduled a meeting with bill so that he could clarify bill’s vision of this venture. using the standard con- tent of a system request as your guide, prepare a list of questions that harry needs to have answered about this project.