Which statements describe this trapezoid?
choose all answers that are correct.
a. all angles are right angles
b. it has only one pair of parallel sides
c. it is a special type of triangle
d. none of the sides are congruent

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.