a) Briefly state under what circumstances a researcher must adopt 1. Random sampling 2. Stratified random sampling 3. Snow ball sampling 4. Purposive sampling b) Assume that you are studying a population of 3000 meat consumers in Katete district. Assume further that these consumers can be distinguished based on their most preferred meat product; chicken, beef, goat and lamb. Based on this classification suppose that there are 1400 consumers who prefer chicken meat the most, 800 prefer beef, 550 prefer goat and 250 prefer lamb. If you intend to select a sample of 1700 meat consumers from this population, how many farmers must be selected from each group/ category if you use 1. Proportionate random sampling 2. Disproportionate random sampling
c) Very briefly state, under what circumstance a researcher must adopt the following methods to determine your sample size 1. Census of the population 2. Concrane approach 3. Yamane method
d) You are attempting to conduct a study about small scale bean farmers in Chinsali. Suppose, a sampling frame of these farmers is not available in Chinsali. Assume further that we desire a 95% confidence level and ±5% precision. 1. How many farmers must be included in the study sample 2. Suppose now that you know the total number of bean farmers in Chinsali as 900. How many farmers must now be included in your study sample
