i. gripped the imagination of: received much attention
ii. dawned upon: realised it for the first time
iii. ushered in: began the new idea
iv. passed into current coin: have been brought into use
v. passport of the future: a thing that makes something possible or enables one to achieve it, authorization of growth
Find the mean deviation about the mean for the data 38, 70, 48, 40, 42, 55, 63, 46, 54, 44.