Survey Sampling 2018 Fall : HW1

Due Date : 2018/10/08

• 강의 교재(7th edition)에서 문제들을 풀어서 제출해 주세요.

• 숙제 제출은 25동 2층 과제함으로 제출해 주세요.

• 제출 기한이 마감된 이후에는 숙제 제출을 받지 않습니다.

• 영문판교재와한글판교재의문제번호가다릅니다. 자신의교재에따라알맞은숙제문제를풀어주세요.

A. 영문판, <Elementary Survey Sampling, 7th edition>

Problem 1. 4.19

Problem 2. 4.47

Problem 3. 5.1

Problem 4. 5.21 (a),(b)- In (a),(b), ‘ignore fpc’ means :

1− n

N≃ 1

Problem 5. 7.11

1

B. 한글판, <표본조사의 이해와 활용>

Problem 1. 4.7

Problem 2. 4.18

Problem 3. 5.1

Problem 4. A quality control inspector must estimate the proportion of defective micro-computer chips coming from two different assembly operations. She knows that, among thechips in the lot to be inspected, 60% are from assembly operation A and 40% are fromassembly operation B. In a random sample of 100 chips, 38 turn out to be from operationA and 62 from operation B. Among the sampled chips from operation A, six are defective.Among the sampled chips from operation B, ten are defective.

(a) Considering only the simple random sample of 100 chips, estimate the proportion ofdefectives in the lot and place a bound on the error of estimation.

(b) Stratifying the sample, after selection, into chips from operation A and B, estimatethe proportion of defectives in the population, and place a bound on the error of estimation.Ignore the fpc in both cases. Which answers do you find more acceptable?

- In (a),(b), ‘ignore fpc’ means :

1− n

N≃ 1

Problem 5. 7.8

2