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The Roman numeral XLIV represents 64 in abrac numerals(normal numbers) :)Improved Answer:-In today's notation of Roman numerals XLIV represents 44.
It could refer to four standard errors. If an observation from a Gaussian (normal) distribution is 4 standard errors away from the mean, it has an extremely low probability.
It depends on the underlying distribution. If Gaussian (standrad normal) then the percentile is 77.
The observation is more than 250 standard deviations (SD) away from the mean. For a normal distribution, the probability of being more than 3 SD from the mean is 0.0027 so the probability of an observation being 250 SD from the mean is infinitesimally small.