Identify the population and the sample. Describe the sample data set. A survey of 155 law firms in a country found that the average hourly billing rate for partners was $638. Identify the population. Choose the correct answer below. all partners all law firms in the country O all people in the country O the law firms that were surveyed Identify the sample. Choose the correct answer below. O all law firms in the country O the law firms that were surveyed O all partners O all people in the country Describe the sample data set. Choose the correct answer below. O A. Charging an average of $638 per hour O B. Partners of 155 law firms were billed exactly $638 per hour. O C. The average hourly billing rate for partners of 155 law firms was $638. O D. The 155 law firms