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The president of a company that manufactures car seats has been concerned about the number and cost of machine breakdowns. The problem is that the machines are old and becoming quite unreliable. However, the cost of replacing them is quite high, and the president is not certain that the cost can be made up in today's slow economy. To help make a decision about replacement, he gathered data about last month's costs for repairs and the ages (in months) of the plant's 20 welding machines.
a. Find the sample regression line.
b. Interpret the coefficients.
c. Determine the coefficient of determination, and discuss what this statistic tells you.
d. Conduct a test to determine whether the age of a machine and its monthly cost of repair are linearly related.
e. Is the fit of the simple linear model good enough to allow the president to predict the monthly repair cost of a welding machine that is 120 months old? If so, find a 95% prediction interval. If not, explain why not.
What Decimal value does the 8-bit binary number 10011110.
Other professional groups (doctors, lawyers) have a complex and difficult process of certification. Consider whether software engineers should be certified in the same way. Weigh the pros and cons.
Determine the greatest magnitude negative number one can represent in an 8-bit 2's complement code? Write your result in binary and decimal.
One of the most difficult aspects of planning software development is estimating the effort. Often times we are asked to provide the estimate early in the process and even before all requirements are known.
How to sketch flow chart to read employee master file and to output number of employees in each department who have a basic degree.
Sending an e-mail to the student's teacher via the system on questions regarding the student's grades.
Why would you design a communication diagram instead of sequence diagram? Describe what the arrow which points to the object in a communication diagram signifies.
Make an object oriented design for a system that contains tracks of your CD and DVD collection. Recognize each of the classes, associated data,and operations for the classes.
Suppose that we are looking in a programming language that allows underscore in variable names. When a scanner sees a character string such as AB_CD.
MS Excel is one of the most comprehensive environments for the compilation and interpretation of information. With its information structuring, analysis, and graphing capabilities.
Research, write, and provide a 4-6 page proposal of the alternative methods the firm might consider for completing the Frequent Shopper Program. Explain how the firm would conduct testing for each development method.
Sketch the E-R diagram for each of the following situations (if you believe which you need to make extra assumptions, clearly define them for each situation).
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