This construction was created using a compass and a straightedge. Why is the length of segment RT the same as the length of segment ST?

if 'T' is the centre of the circle, then RT and ST are radius, it means, RT=radius and ST=radius, then ST=RT.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.