Open the EFS data-set in SPSS a. Compute the mean of the variable cc3111 (clocks, watches and jewelery) on the whole data-set b. Now, extract a sample of 60 units and compute the sample means using:...

Open the EFS data-set in SPSS

a. Compute the mean of the variable cc3111 (clocks, watches and jewelery) on the whole data-set

b. Now, extract a sample of 60 units and compute the sample means using:

i. Simple random sampling

ii. Stratified sampling (using INCRANGES - income quartiles as stratification variable)

iii. Systematic sampling

c. What is the sampling error? Which one is the most accurate method? And the most precise?