If the inter-arrival time and service time in a public telephone booth with a single phone follow exponential distributions with means of 10 and 8 minutes respectively, find the average number of callers in the booth at any time.

Suppose that the length of long distance phone calls, mea- sured in minutes, is known to have an exponential distribution with the average length of a call equal to 15 minutes. Find the CDF.

Based on the scatterplot and residual plot, what type of model would be appropriate for summarizing the relationship between days and number of views? A popular television show recently released a video preview for the upcoming season on its website. As fans of the show discover the video, the number of views of the preview video has grown each day during the last 2 weeks. The number of days since the release of the video and the natural log of the number of video views is shown in the scatterplot. O An exponential model is appropriate because the residual plot does not show a clear pattern. O A linear model is appropriate because the scatterplot shows a strong, positive linear relationship. In(Views) vs. Days O A power model is appropriate because the scatterplot of days and natural log of views is strong and linear. 10 9.5 An exponential model is appropriate because the relationship between days and the natural log of views is linear, and the residual plot does not show a clear…

A crew is building a series of identical day spas around the United States for a lifestyle company. They build the first one in 160 days from groundbreaking to ribbon-cutting. If the crew's learning curve rate is 97%, it will take nearest 1/10th, to construct the fifth day spa. days, to the