Use the table. What inference can you make by comparing the measures of variability? Use the drop down menus to explain your answer.

The (mean, mean absolute deviation) is greater for this year’s 100 meter dash, which suggests that all 30 students (did not improve, improved) equally.

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true