The association between overweight and mortality is controversial. While some studies have observed a positive association between being overweight and all-cause mortality, others have found no such association. A renowned social epidemiologist conducted a study among 500 women in Missouri and assessed the relation of obesity with mortality. She insisted on using an alpha of 0.01 instead of the conventional 0.05 level of significance. Since she did not find any statistically significant association between overweight and mortality, can we conclude that her findings are valid, assuming all selection and information bias are kept at a minimum and rigid control for confounding factors were implemented in the analysis?Give two reasons.