Question

For the following report about a statistical study, identify the following items. If you can’t tell, then say so.

“A recent survey conducted by radio station Triple J found that there was overwhelming support for drug testing at music festivals”

a) The population of interest
b) The population parameter
c) The sampling frame
d) The sample
e) The sampling method, including whether or not randomisation was employed
f) Who (if anyone) was left out of the study
g) Any potential sources of bias you can detect and any problems you see in generalising to the population of interest

Answer 1

A) population of interest is all the people attending the festival

B) the parameter is drug test result.

C) sampling frame : can be randomly selecting every 10th person or 5th person or so on based on total population size. But it has to be distributed on entire population.

D) Sample is persons selected and tested .

E) it can be stratified sampling by using people from all age groups, or it can be distributed in time slots based on arrival of people.

F) the people that are not in the sample.

G) source of bias may be there as some people that remain quite and secluded may not be tested. They works as outliers.