Mr. Rose is a new quality-control inspector at a factory that produces axles for a certain model of car. Because the manufacturing process takes several steps, there is some variability in the length of the axles produced at the factory. Specifically, the distribution of axle lengths is Normal with a mean of 597 mm and a standard deviation of 5.3 mm. (a) Mr. Rose randomly selects one axle. Find the probability that the length of the axle is less than 595 mm. (b) Mr. Rose randomly selects 20 axles. Find the probability that the mean length of the axles is less than 595 mm

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.