Help plz I am being timed will give brainliest

-3/4

Step-by-step explanation:

2 1/2 = 5/2 = 10/4

1 3/4 = 7/4

when you subtract, you add and change the sign of the second term (add the opposite)

-10/4 + 7/4 = -3/4

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.

any options?

step-by-step explanation: