Which statement is true about the variability of the distributions? the interquartile range of the typing speeds after the course is greater than the interquartile range of the speeds before the course. the interquartile ranges of the two distributions are the same. the range of the speeds after the course is smaller than the range of the speeds before the course. the ranges of the two distributions are the same.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.