5.5 Statistical significance. In the study described in Exercise 5.2, researchers found that, by the end of the study, there was a statistically significant difference in the likelihood of dying between those who regularly attend religious services and nonattenders. Nonattenders were 25% more likely to have died by the end of the study. Statistical significance here means
(a) the size of the observed difference in the likelihood of dying is not likely to be due to chance.
(b) the size of the observed difference in the likelihood of dying is likely to be due to chance.
(c) the size of the observed difference in the likelihood of dying has a 25% chance of occurring.
(d) the size of the observed difference in the likelihood of dying has a 75% chance of occurring.