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Compute the standard deviation and recommend the minimum and maximum number of bugs to be used in decisions making

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

The table below shows the number of bugs in software recorded by 120 scientists during a test phase.

474 428 447 483 435 465 498 452 418 483 440 458

474 430 447 407 501 466 498 453 419 485 441 459

475 430 448 407 436 468 500 453 420 486 442 459

476 430 449 408 502 468 502 453 421 488 442 460

477 431 450 410 436 469 502 454 421 489 443 460

478 432 450 412 438 470 505 455 423 490 444 462

479 432 451 413 438 471 508 455 424 493 444 462

481 433 451 413 438 471 509 456 424 494 445 462

482 433 451 415 509 472 511 457 425 495 446 463

482 434 452 416 440 473 515 457 426 497 447 464

Use the data to

a) Extract a frequency distribution table with the first-class as 401-420.

b) Compute the mean, mode, and median number of bugs

c) Compute the standard deviation and recommend the minimum and a maximum number of bugs to be used in decisions making.

d) Assuming that it costs 200/= to rectify each bug identified. Recommend the budget amount that should be set aside to rectify the identified bugs

e) How would you use the measures above to aid decisions in your day-to-day work at your current workplace? ( indicate your workplace and position or your former workplace and position)

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