Use the following information to answer question. A national survey was conducted to study the increase in the cost of personal health insurance. Forty people from 3 regions were asked about the increase in the table year. The results are compiled in the following table; the data do not follow a normal distribution.

Do a test at the 5 percent level of significance to determine whether the average increase in the Northeast is higher than that on the West Coast.

Transcribed Image Text:

Northeast $320 279 283 West Coast $232 257 264 Southeast $254 231 242