CoolRepairs asked all the customers to complete survey on how they felt about the services with regards to their level of satisfaction on the job done and received responses from 30% of them. Comment briefly on the appropriateness of this method of sampling and suggest whether you think it may introduce biases. Survey on how they felt about the services with regards to their level of satisfaction on the job done and received responses from 30% of them. Comment briefly on the appropriateness of this method of sampling and suggest whether you think it may introduce biases.