## Statistics: Informed Decisions Using Data (4th Edition)

The data in ascending order: 2940, 3100, 3200, 3780, 3830, 3960, 4040, 4090, 4090. The mean: $\frac{2940+3100+3200+3780+3830+3960+4040+4090+4090}{9}=3670$ There are 9 values. So, the median is the 5th value: 3830. The mode strength is 4090 because it appears twice and the others appear once.