The Statistical part was included in only one chapter given the ample details provided
for the probability part. For this, the necessary terminology in statistics is presented well as it
should be. Thereafter, the exploitation of the central tendency to determine the confidence
interval and the risk of error according to different situations are presented in detail and with
illustrative examples.
Keywords: Confidence interval, Central tendency and indicators, Relative standard deviation, Risk of error, Statistical series, Vocabularies.
