Fundamentals of Statistics

1. In the word “The tools of Quality Part IV: Histograms” (Quality Progress, September 1990, Vol. XXIII, No.9, pp.75-78) postulates are presented on the constitute of 120 amplifiers. These postulates are reproduced adown. 

a) Construct a stem-and-leaf evince tread by tread. Category Interval=1 (7,8,9,10,11 as stems, and decimal sum as leaf) (3pts). 

b) Observe on the mould of the evince in a. Can you compel an selfreliance that the postulates follows ordinary disposal? Why? (2pt)

c) Construct a stem-and-leaf evince tread by tread. Category Interval=0.5 (7.0≤X<7.5, 7.5≤X<8, 8.0≤X<8.5, ….) (1pts). 

8.1

10.4

8.8

9.7

7.8

9.9

11.7

8.0

9.3

9.0

8.2

8.9

10.1

9.4

9.2

7.9

9.5

10.9

7.8

8.3

9.1

8.4

9.6

11.1

7.9

8.5

8.7

7.8

10.5

8.5

11.5

8.0

7.9

8.3

8.7

10.0

9.4

9.0

9.2

10.7

9.3

9.7

8.7

8.2

8.9

8.6

9.5

9.4

8.8

8.3

8.4

9.1

10.1

7.8

8.1

8.8

8.0

9.2

8.4

7.8

7.9

8.5

9.2

8.7

10.2

7.9

9.8

8.3

9.0

9.6

9.9

10.6

8.6

9.4

8.8

8.2

10.5

9.7

9.1

8.0

8.7

9.8

8.5

8.9

9.1

8.4

8.1

9.5

8.7

9.3

8.1

10.1

9.6

8.3

8.0

9.8

9.0

8.9

8.1

9.7

8.5

8.2

9.0

10.2

9.5

8.3

8.9

9.1

10.3

8.4

8.6

9.2

8.5

9.6

9.0

10.7

8.6

10.0

8.8

8.6

Please be noted: you are not expected to use Excel Histogram operation in this substance. In the proximate ordinance, this operation must be used. 

2. An illustration in chemistry looked at the movables of sky on the solubility of salt in breathe-into. Adown are postulates on the solubility of Potassium Chloride (KCL). Construct a strew conspire of the postulates and observe on the connection between sky and solubility using Microsoft Excel. (3pts)

Temp. °C

0

10

20

30

40

50

60

70

80

90

100

Solubility

29.6

28.0

33.6

38.1

34.2

42.6

44.8

48.1

56.5

55.4

62.9

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