Question

The operator of the local mall wants to find out how many of the mall's employees make purchases in the food court when they are working. she hopes to use these data to increase the rent and attract new food vendors. in total, there are 1023 employees who work at the mall. the best method to obtain a random sample of the employees would be to survey

Answer 1

The correct answer is "to survey every 30th employee entering each mall entrance for one week".

Why is it considered to be the best method to get a random sample of the employees? The 30th employee, who enters the mall for the week is a random element and may work at different locations in the mall, which gives you a better random sample for the survey.