29.6 Conclusions

The one-tailed $P$-value is $0.0635$, suggesting only slight evidence supporting $H_1$. To write a conclusion, an answer to the RQ is needed, plus evidence leading to that conclusion; and some summary statistics, including a CI (indicating the precision of the statistic):

Slight evidence exists in the sample (paired $t=1.68$; one-tailed $P=0.0635$) of a mean energy saving in the population (mean saving: 0.54 MWh; $n=10$; 95% CI from $-0.19$ to $1.27$ MWh) after adding the insulation.

The wording implies the direction of the differences (by talking of ‘savings’). Of course, statistically validity shoud be checked; this was done in Sect. 23.9, but the validity conditions are given again in the next section, for completeness.