Question

means and mean absolute deviations of sidneys and phils grades sidney phil mean 82 78 mean absolute deviation 3.28 3.96 which expression represents the ratio of the difference of the two means to sidneys mean absolute deviation? 82/3.28 4/3.28 4/0.68 82/0.68

Explanation:

Step1: Calculate the difference of the two means

The mean of Sidney's grades is \(82\) and the mean of Phil's grades is \(78\). The difference of the two means is \(82 - 78=4\).

Step2: Identify Sidney's mean absolute deviation

Sidney's mean absolute deviation is \(3.28\).

Step3: Form the ratio

The ratio of the difference of the two means to Sidney's mean absolute deviation is \(\frac{4}{3.28}\).

Answer:

\(\frac{4}{3.28}\) (corresponding to the second option in the multiple - choice list)