Choose the right assertions from the following sentences

When the distribution is bimodal (two peaks), usually there are two process: it means that the products are manufacturing in slightly different conditions (machining on two different milling machines for instance).

Match the correct definition to the word.

The most common method of finding outliers with the Interquartile Range (IQR) is to define outliers as values that fall outside of 1.5 x IQR below Q1 or 1.5 x IQR above Q3

Match the correct definition to the french word

The upper quartile, or third quartile (Q3), is the value under which 75% of data points are found when they are arranged in increasing order.

What are the numbers that gives us a way to describe a distribution using only five numbers ?

Select tests that check normality analytically

The lower quartile, or first quartile (Q1), is the value under which 75% of data points are found when they are arranged in increasing order.

If the pattern of the distribution is "flatter" than a normal distribution (the ends of the histogram is quiet higher than expected with the normal districbution assumption), the main reasons may be :