the owner of a catering company wants to select a random sample of clients to find out about their food…

the owner of a catering company wants to select a random sample of clients to find out about their food preferences. select yes or no to tell whether each method results in a random sample of the population. the owner uses a database to print the names of all clients on slips of paper. the owner chooses 20 of the slips of paper without looking. the owner sends a survey to every client who spent more than $500 with the catering company in the past year. the owner sends a survey to all clients whose phone number ends in 5. the owner sends a survey to the last 20 clients who used the catering companys services.

the owner of a catering company wants to select a random sample of clients to find out about their food preferences. select yes or no to tell whether each method results in a random sample of the population. the owner uses a database to print the names of all clients on slips of paper. the owner chooses 20 of the slips of paper without looking. the owner sends a survey to every client who spent more than $500 with the catering company in the past year. the owner sends a survey to all clients whose phone number ends in 5. the owner sends a survey to the last 20 clients who used the catering companys services.

Answer

Brief Explanations:

  1. When the owner prints all client names on slips and chooses 20 without looking, each client has an equal chance of being selected, so it's a random sample.
  2. Sending a survey only to clients who spent more than $500 in the past year is a non - random sample as it only includes a specific subset of clients based on a spending criterion.
  3. Sending a survey to all clients whose phone number ends in 5 is non - random as it selects clients based on a phone number characteristic rather than randomly.
  4. Sending a survey to the last 20 clients is non - random as it only includes clients from a particular recent time period and not randomly from the entire population.

Answer:

  1. Yes
  2. No
  3. No
  4. No