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Question: Automated materials handling. Modern warehouses use computerized and automated guided vehicles for materials handling. Consequently, the physical layout of the warehouse must be carefully designed to prevent vehicle congestion and optimize response time. Optimal design of an automated warehouse was studied in the Journal of Engineering for Industry (August 1993). The layout assumes that vehicles do not block each other when they travel within the warehouse (i.e., that there is no congestion). The validity of this assumption was checked by simulating (on a computer) warehouse operations. In each simulation, the number of vehicles was varied and the congestion time (total time one vehicle blocked another) was recorded. The data are shown in the accompanying table. Of interest to the researchers is the relationship between congestion time (y) and number of vehicles (x). Conduct a complete simple linear regression analysis.
A concessionaire for the local ballpark has made a table of conditional values for the different alternatives also states of nature
If a horse is chosen at random, what is the probability the horse exhibited head movements to Mozart or to heavy metal or to both?
Test whether the gender distribution for basketball fans is significant different from general college by proportion test.
Consider only the winning times for men. Is there evidence of a linear trend? If so, propose a straight-line model for predicting winning time (y) based on year (x). Would you expect the slope of this line to be positive or negative?
Two advertisements for tourism and vacation on Turks and Caicos Islands, which ran in business publications in May 2007, were compared for their appeal.
To estimate the number of typographical errors in a 65-page manuscript, a systematic sample of pages is selected by first selecting a random number between 1 and 10 and including in the sample that numbered page and every 10th page thereafter.
The psychic was presented with 200 cards face down and asked to determine if the card was one of five symbols: a star, cross, circle, square, or three wavy lines.
What is the probability that, for the period in question, both the interest rate will decline and production will increase?
Each vehicle had the gallon of gas added to the empty tank and then driven until empty. Number of miles travelled for all twelve readings are below. Use data to compute the mean and median mileages.
Compute the 95% confidence interval using the two-sample t confidence interval.- Compute the 95% confidence interval using the matched pairs t confidence interval.
To obtain an estimate, the attendant decides to ask the next 200 gasoline customers how many vehicles their households own.
A student team in a business statistics course wanted to determine if there was a difference in average download times for the three different types of computers (Mac, iMac, and Dell) available at the university library.
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