s 6. A computer company executes projects on an ongoing basis. The cost of each project is estimated prior to commencing work. The size of the project and the company's ability to complete it on budget are very important to continued success. This study was undertaken to answer the following questions. The data file is complian.mtw if you use Minitab. (1) Does project size, as measured by actual costs, change over time? Hint: You should develop a sequence plot of actual costs and observe whether there is a trend. (2) Is the difference between estimated and actual project costs related to project size? Hint: You should first construct a new column which is the difference between estimated and actual project costs. You then generate a scatter plot of the new column and the project size and try to see whether there is a relationship between the two. 9. In this problem, you are required to create a simple random sample of size 50 from the following data stored in C2. The data file is city.mtw. a. Create the simple random sample by using the random number table provided in the text. When using the table, start from the fourth number in the first row, and then move towards the right on the first row. You only need to show the first 5 numbers. Explain your procedure. b. Use Minitab to do the same. Store the simple random sample in an empty column. WORKSHEET STORED BY MINITAB VERSION 6.1 1997 221 Release 9.1E ########o##########z### A###A###A###A##@##@##@###A###A###A##@##0A##@##0A###A##@###A##@###A## @###A##@###A###A###A## A##@##@##@###A###A###A###A##0A## A###A###A## A###A## A##@###A##@###A###A###A###A###A##@###A##@###A##@##@###A##@##@##0A## #A##0A##@###A##@##@##@###A###A##@###A##@###A##@###A###A##@##0A###A# #@###A###A###A##@###A##@##@## A###A##@## A##@##@## A##@##@##@###A##@##@##@###A##@##@##@##@##@##@##@##@###A## @##@########o########l#0##D# D#iD##D#@)D# D##D#D#`D#dD#RD#D#@.D# D#`D#@MD##dD#@ND#@D#aD##wD#@HD#vD#D##D##D#TD#QD#CD##D##zD#@wD #@|D##D#D#`D#@D#@D##D#D##C# D##\\D# D#D# D# D#@D###D#hD##D# D#