An initial analysis of one-way ANOVA showed, taking relative humidity as the main control variable, two main groups of indoor ambiences for a significance level of 0.05 in agreement with the expected effect of wall construction materials, as can be seen in Table 3. From this table, we can conclude that indoor ambiences in new buildings showed the same behaviour, and that this is clearly different from the old buildings at a significance level of 0.05.
On the other hand, the old buildings were not too far from the significance limit fixed for this study. Consequently, these old buildings showed certain tendencies to attaining similar am-biences, and being clearly different from the new ones. Despite
this, old buildings are not a statistical group.