To evaluate the variability and average salaries based on the information provided, we can look at the mean and range for each company.
(a) To determine which company's salaries have the least variability, we can assess the range since a lower range generally suggests lower variability in salaries.
- Company A: Range = $44,000
- Company B: Range = $47,000
- Company C: Range = $52,000
- Company D: Range = $53,000
Company A has the smallest range at $44,000, which indicates that Company A's salaries have the least variability.
Answer: Company A
(b) To find the company with the highest average salary, we can compare the mean salaries provided:
- Company A: Mean = $19,000
- Company B: Mean = $16,000
- Company C: Mean = $25,000
- Company D: Mean = $18,000
Company C has the highest mean salary at $25,000.
Answer: Company C