Unit 2

In snowball sampling, an initial group of respondents is selected, usually at random.

– After being interviewed, these respondents are asked to identify others who belong to the target population of interest.

– Subsequent respondents are selected based on the referrals.

Seatwork – Group @ most 4 members per group

1.You want to assess the level of performance of 2500 nurses working in a certain city. The problem is some of them are not available as respondents of your study. Compute your sample size using1%, 2% and 5% margin of error.

2. Use stratified random sampling to solve for the sample size of the given table below (e = 4%).

Educational QualificationsUniversity Bachelors Masters Doctoral

WU 82 45 13

GU 95 47 20

SU 108 39 18