ISS (Statistical Services) Statistics Paper IV: Questions 27 - 30 of 92
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Question 27
Describe in Detail Subjective▾
Compute GFR, SFR, TFR and GRR from the data given below:
Age groups of child bearing females | Number of women (՚000) | Total births |
15 - 19 | 16.0 | 260 |
20 - 24 | 16.4 | 2244 |
25 - 29 | 15.8 | 1894 |
30 - 34 | 15.2 | 1320 |
35 - 39 | 14.8 | 916 |
40 - 44 | 15.0 | 280 |
45 - 49 | 14.5 | 145 |
Assume that the proportion of female births is 46.2 percent.
EditExplanation
First write the formula of GFR, SFR, TFR and GRR is
… (31 more equations) …
Question 28
Describe in Detail Subjective▾
The following are the figures of defectives in 22 lots each containing 2,000 bulbs. Ind control limit for p-Chart.
425 | 430 | 216 | 341 | 225 | 322 | 280 | 306 | 337 | 305 | 356 |
402 | 216 | 264 | 126 | 409 | 193 | 326 | 280 | 389 | 451 | 420 |
Explanation
We have n = 2000
… (351 more equations, 37 figures) …
Question 29
Describe in Detail Subjective▾
Each day a sample of 1500 items from a production process was examined. The number of defectives found in each sample was as follows. With a suitable control chart, check out for control 4, 6, 6, 2,15, 4,4
EditExplanation
We have n = 30
… (208 more equations, 23 figures) …
Question 30
Describe in Detail Subjective▾
a) The number of customer complaints are recorded at a television manufacturing company. Complaints have been recorded over the past 20 weeks. Construct 3-σ control limits for the c-chart.
Week | No. of complaints | Week | No. of complaints |
1 | 0 | 11 | 4 |
2 | 3 | 12 | 3 |
3 | 4 | 13 | 1 |
4 | 1 | 14 | 1 |
5 | 0 | 15 | 1 |
6 | 0 | 16 | 0 |
7 | 3 | 17 | 2 |
8 | 1 | 18 | 1 |
9 | 1 | 19 | 2 |
10 | 0 | 20 | 2 |
b) A machine is manufacturing mica discs. samples of size 5 are drawn every hour and their thickness in units are recorded as follows. From this data construct 3-σ control limits for chart.
Sample No. | Observstions | ||||
1 | 8 | 9 | 15 | 4 | 11 |
2 | 7 | 10 | 7 | 6 | 8 |
3 | 11 | 12 | 10 | 9 | 10 |
4 | 12 | 8 | 6 | 9 | 12 |
5 | 11 | 10 | 6 | 14 | 11 |
6 | 7 | 7 | 10 | 4 | 11 |
7 | 10 | 7 | 4 | 10 | 10 |
8 | 8 | 11 | 11 | 7 | 7 |
9 | 8 | 11 | 8 | 14 | 12 |
10 | 12 | 9 | 12 | 17 | 11 |
11 | 7 | 7 | 9 | 17 | 13 |
12 | 9 | 9 | 4 | 4 | 11 |
13 | 10 | 12 | 12 | 12 | 12 |
14 | 8 | 11 | 9 | 6 | 8 |
15 | 10 | 13 | 9 | 4 | 9 |
16 | 9 | 11 | 8 | 5 | 11 |
Explanation
… (58 more words, 1 table) …