Final answer:
The correct answer is a. The employees whose names start with 'R'. A summary statistic is a numerical value that summarizes and describes a set of data.
Step-by-step explanation:
The correct answer is a. The employees whose names start with 'R'.
A summary statistic is a numerical value that summarizes and describes a set of data. Options b, c, and d are all examples of summary statistics:
- The average income of entry level employees: This is a summary statistic that represents the central tendency of the incomes of entry level employees.
- The employees with the highest salary: This is a summary statistic that identifies a specific characteristic of the employees.
- The total number of employees in a company: This is a summary statistic that represents the total count of employees in a company.
On the other hand, option a does not represent a summary statistic because it does not provide any summary or descriptive value about the data.