Question 2 30 marks This question is based on your work on MU125' up to and including Unit 4. An IT company develops software for the nancial services industry. It tests its code using an industry standard software package. Aiming to expand its business and be more competitive in the sector, the company has decided to pilot an inhouse software package to test its code. A company researcher wishes to compare the times taken for each package to complete tests. Both software packages were run on 20 occasions testing the same code. The researcher records the times taken on each occasion, and these are shown in Table 1. Table 1 Comparison of test times in minutes for the industry standard and inhonse software testing packages Test number Industry standard software package Inhouse software package 1 457 415 2 437 435 3 444 460 4 432 454 5 476 448 6 468 437 7 444 428 8 448 435 9 656 437 10 462 455 11 460 458 12 454 439 13 467 447 14 491 451 15 466 435 16 476 448 17 436 425 18 449 432 19 492 454 20 486 444 (a) (i) Which of the three types of investigation discussed on pages 210214 of Unit 4 is this? Explain your answer briey. (ii) Are these primary or secondary data, from the researcher's point of View? Explain your answer briey. (b) Spend a few minutes scanning these datasets by eye. (i) List any three features that you should be looking for when scanning datasets by eye. (ii) Comment on whether or not you think there might be a problem with each of the most extreme values (maximum and minimum) in each column. (c) Copy and complete the following table using the datasets given above to work out the missing values. [4] Number of minutes to complete the test Industry standard In-house Minimum (Min) Lower quartile (Q1) 446 435 Median 461 441.5 Upper quartile (Q3) 476 452.5 Maximum (Max) Mean 470.05 441.85 Standard deviation (SD) 46.06 11.7 Interquartile range (IQR) Range Size of dataset (n) 20 20