IGNOU MSTL-001 Assignment Solution 2022

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IGNOU MSTL-001 Solved Assignment 2022 

Assignment Paper

IGNOU MSTL-001 Solved Assignment 2022

Subject Name

Basic Statistics Lab

No.of Pages in Solution

42

Course

PGDAST

Language

ENGLISH

Session

2022

Last Date for Submission of Assignment

As per dates given in the IGNOU website

 

 

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IGNOU MSTL-001 Solved Assignment 2022 

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MSTL-001 Assignment Sample Solution

MSTL-001 Assignment Question Paper 

MSTL-001: Basic Statistics Lab                          Download Question Paper 

 

MSTL-001: Basic Statistics Lab

Note: 

  1. All questions are compulsory.
  2. Solve the following questions in MS Excel 2007.
  3. Take the screenshots of the final output/spreadsheet.
  4. Paste all screenshots in the assignment booklet with all necessary hypotheses, interpretation, etc.

Q 1) The production of semiconductors needs a lot of water to cool down the equipment and clean silicon wafers. To study the water wastage during the production of semiconductor chips, the data of the water required for past 100 days in two plants: Plant A and Plant B are given in the following table:

Day

Plant A (in ‘000
litres)

Plant B (in ‘000
litres)

1

616

670

2

656

766

3

780

910

4

728

850

5

814

650

6

648

756

7

748

872

8

780

910

9

624

730

10

642

750

11

764

892

12

814

950

13

656

766

14

678

790

15

858

1030

16

632

760

17

624

702

18

900

1080

19

684

728

20

726

872

21

912

1096

22

868

1042

23

674

810

24

708

850

25

812

976

26

856

1028

27

640

768

28

744

892

29

856

1028

30

652

782

31

774

716

32

636

762

33

754

906

34

704

846

35

788

946

36

626

752

37

724

870

38

754

906

39

632

726

40

622

746

41

740

890

42

788

946

43

636

762

44

656

788

45

854

1026

46

630

756

47

708

698

48

896

1076

49

624

726

50

724

870

51

910

1092

52

866

1040

53

672

806

54

704

846

55

810

972

56

854

1024

57

638

766

58

740

890

59

854

1024

60

650

780

61

684

712

62

632

760

63

752

902

64

702

842

65

786

942

66

624

748

67

722

866

68

752

902

69

642

722

70

664

742

71

738

886

72

786

942

73

632

760

74

652

784

75

852

1022

76

626

752

77

692

696

78

894

1072

79

652

722

80

722

866

81

908

1090

82

862

1036

83

668

802

84

702

842

85

808

970

86

850

1022

87

634

762

88

738

886

89

850

1022

90

646

776

91

704

710

92

630

756

93

750

900

94

700

840

95

782

940

96

654

746

97

718

862

98

750

900

99

628

720

100

702

740

Answer the followings:

  • Which plant has more wastage of water?

  • Which plant shows greater variability in the wastage of water?

  • Determine the correlation between the wastage in both plants.

  • Compute suitable width of the class intervals for both plants.

  • Construct the continuous frequency distribution for both plants.

  1. The number of employees (in hundreds) and the revenues (in ₹ hundred crores) of 20 companies were recorded to access the relationship between the revenue generated and strength of the employees. The data are given in the following table:

S. No.

No. of Employees (in ’00)

Revenue (in ₹ ’00 crores)

1

165

335

2

550

425

3

330

345

4

550

415

5

275

325

6

330

360

7

385

360

8

330

365

9

440

410

10

385

375

11

275

335

12

495

390

13

495

395

14

440

395

15

495

400

16

440

425

17

220

320

18

330

420

19

440

425

20

330

370

 

Compute the Spearman’s rank correlation coefficient between the number of employees and the revenues of the companies.

  1. For the data given in Question 1, compare the water wastage of both plants to get the answers of the following questions:

I ) Is there enough evidence that the average water wastage of Plant A is more than the average water wastage of Plant B at 5 % level of significance?

II ) Are the variances of the distributions of water wastage of Plants A and B equal at 5 % level of significance?

  1. Suppose that a production house wants to evaluate the popularity of eight books on a particular subject. The customer service manager of the production house hires seven evaluators with varying experience in that subject to review the books. To reduce the effect of the variability from evaluator to evaluator, she uses a randomised block design, with evaluators serving as the blocks. The eight books are the groups of interest.

The seven evaluators assigned to each of the eight books in a random order. A rating scale from 0 (low) to 100 (high) is used. The following table summarises the results:

Evaluators

Books

 

A

B

C

D

E

F

G

H

E1

68

59

80

72

66

57

78

79

E2

75

73

86

74

73

71

84

85

E3

74

65

88

78

72

63

80

86

E4

78

61

85

74

76

59

83

84

E5

82

64

90

82

80

62

88

89

E6

76

66

92

84

74

64

78

90

E7

75

73

86

74

73

71

84

82

 

The effect of each evaluator of eight books is normally distributed with approximately equal variances.

i) Analyse the design at 5% level of significance.

ii) Is the average popularity of the eight books significantly different? If the difference between the averages popularity of the eight books is significant, do the pair-wise comparison between them.

 

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MSTL-001 Solved Assignment 2022

IGNOU MSTL-001 Assignment Solution 2022

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