IELTS Scores Table A Class B Class 560 494 546 483 581 528 531 550 570 506 537 483 557 526 570 526 561 455 529 478 540 503 567 503 535 489 536 481 534 553 569 500 606 502 537 498 524 508 563 478 523 493 555 471 612 515 554 486 579 485 526 477 549 520 556 500 537 498 Do the problem using Ms. Excel Based on data on sheet Two Samples a. Perform tests to prove the assumption whether the two classes have same variance values b. test whether the average IELTS score of class A students is higher than Average IELTS score of class B students. Assume both classes have the same variance equal and use α = 0.05.

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ISBN:9781119256830
Author:Amos Gilat
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IELTS Scores Table

A Class B Class
560 494
546 483
581 528
531 550
570 506
537 483
557 526
570 526
561 455
529 478
540 503
567 503
535 489
536 481
534 553
569 500
606 502
537 498
524 508
563 478
523 493
555 471
612 515
554 486
579 485
526 477
549 520
556 500
537 498

Do the problem using Ms. Excel

Based on data on sheet Two Samples
a. Perform tests to prove the assumption whether the two classes have same variance values
b. test whether the average IELTS score of class A students is higher than Average IELTS score of class B students. Assume both classes have the same variance equal and use α = 0.05.

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