Forbes Media conducted research on customer loyalty programs and found approximately 50% of customers would join the loyalty program of a brandfrom which they often purchase products or services. The manager of a coffee store would like to know if this figure holds true for customers at her storetoo. For a certain day, she obtains a list of all the transactions placed at this store on this day and randomly selects 85 of them. She then records whatproportion of these transactions are affiliated with a customer loyalty account. (Additional transactions which originate from the same customer arediscarded.)

a) Identify the population: The proportion of this store's customers who utilize the customer loyalty program. The proportion of the selected 85 transactions which are affi liated with a customer loyalty account. All the transactions placed at this store on the chosen day. All customers of this coff ee store.

(b) Identify the sampling frame: The proportion of this store's customers who utilize the customer loyalty program. The proportion of the selected 85 transactions which are affi liated with a customer loyalty account. All the transactions placed at this store on the chosen day. All customers of this coff ee store.

(c) Identify the statistic: The proportion of this store's customers who utilize the customer loyalty program. The proportion of the selected 85 transactions which are affi liated with a customer loyalty account. All the transactions placed at this store on the chosen day. All customers of this coff ee store.

D What is the main type of bias likely to be present with the above survey? Undercoverage bias Non-response bias Voluntary bias Response bias