Happy-Life Years. In the article, “Apparent Quality-of-Life in Nations: How Long and Happy People Live” (Social Indicators Research, Vol. 71, pp. 61–86) R. Veenhoven discussed how the quality of life in nations can be measured by how long and happy people live.

In the 1990s, the median number of happy-life years across nations was 46.7. A random sample of eight nations for this year provided the following data on number of happy-life years. 30.3 47.0 56.4 30.5 39.6 47.9 29.7 52.5 At the 5% significance level, do the data provide sufficient evidence to conclude that the median number of happy-life years has changed from that in the 1990s?