6.6 Table 6.1 contains the measurement of the thermal energy of certain sources using two independent methods labeled as method #1 and method #2. For each source, the measurement is made at a given radius, which varies from source to source. The error bars indicate the 68%, or 1, confidence intervals; the fact that most are asymmetric indicate that the measurements do not follow exactly a Gaussian distribution. Calculate the weighted mean of the ratios between the two measurements and its standard deviation, assuming that the errors are Gaussian and equal to the average of the asymmetric errors, as it is often done in this type of situation.