ISS Statistics Paper IV: Questions 41 - 42 of 79

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Question number: 41

» Statistical Quality Control » Control Charts » Variable

Essay Question▾

Describe in Detail

A electric Company uses a process to paint refrigerators with a coat of enamel. During each shift, a sample of five refrigerators is selected and the thickness of the paint in mm is determined. Find upper control limit (UCL) the lower control limit (LCL) for R chart.

Given are observations find UCL and LCL for R Chart

Given are observations UCL and LCL for R Chart

Sample No.

Observations

1

2.7

2.3

2.6

2.4

2.7

2

2.6

2.4

2.6

2.3

2.8

3

2.3

2.3

2.4

2.5

2.4

4

2.8

2.3

2.4

2.6

2.7

5

2.6

2.5

2.6

2.1

2.8

6

2.2

2.3

2.7

2.2

2.6

7

2.2

2.6

2.4

2.0

2.3

8

2.8

2.6

2.6

2.7

2.5

9

2.4

2.8

2.4

2.2

2.3

10

2.6

2.3

2.0

2.5

2.4

11

3.1

3.0

3.5

2.8

3.0

12

2.4

2.8

2.2

2.9

2.5

13

2.1

3.2

2.5

2.6

2.8

14

2.2

2.8

2.1

2.2

2.4

15

2.4

3.0

2.5

2.5

2.0

16

3.1

2.6

2.6

2.8

2.1

17

2.9

2.4

2.9

1.3

1.8

18

1.9

1.6

2.6

3.3

3.3

19

2.3

2.6

2.7

2.8

3.2

20

1.8

2.8

2.3

2.0

2.9

Explanation

UCL and LCL for R Chart with Sample Range

Calculating the UCL and LCL for R Chart

Sample No.

Observations

Sample Range

1

2.7

2.3

2.6

2.4

2.7

0.40

2

2.6

2.4

2.6

2.3

2.8

0.50

3

2.3

2.3

2.4

2.5

2.4

0.20

4

2.8

2.3

2.4

2.6

2.7

0.50… (191 more words) …

Question number: 42

» Demography and Vital Statistics » Standardized Death Rates

Essay Question▾

Describe in Detail

Compute the crude and standardized death rates of the populations A and B, regarding A as standard population, from the following data:

Table shows the crude and standardized death rates of the populations A and B

showing table of the crude and standardized death rates of the populations A and B

Age groups

(years)

A

B

Population

Deaths

Population

Deaths

Under 10

20000

600

12000

372

10 - 20

12000

240

30000

660

20 - 40

50000

1250

62000

1612

40 - 60

30000

1050

15000

525

Above 60

10000

500

3000

180

Explanation

From the given data, the crude death rate for any population is

C.D.R=No.ofdeathsintheyearAnnualmeanpo… (439 more words) …

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