In 1995, the median salary of U.S. doctors was $140,900. A random sample of 15 physicians showed 1999 incomes of:
145,000 150,300 122,600 218,000 252,500 126,800 131,700 151,400 134,500 142,000 120,000 138,000 128,600 145,500 157,200
Does it appear that the median salary of U.S. doctors was greater in 1999 than it was in 1995?
Sign Test for Median: Salary
Sign test of median = 140900 versus > 140900
N Below Equal Above P Median
Salary 15 7 0 8 0.5000 142000