mean difference
1.QCT was then performed on all three scans. Results The mean bone density for the clinical noncontrast study was 96.54 versus 87.70 for QCT( mean difference 8.85, P = 0.0005; 95 % confidence intercal 4.32 - 13.38).
3.The mean absolute differences between the simulated and the observed were computed. The mean absolute difference of the amplitude is 3.46 cm,and the mean absolute difference of the phase-lag is 3.89°.
4.The paper gives portfolio optimal selection models of mean extremal difference and mean absolute deviation, and compares their results with an exemple.
6.Mean temperature difference for countercurrent flow and cocurrent flow in steady continuous heat transfer has been deduced uniformly.
7.Yet any delay in emergency treatment could mean the difference between life and death or permanent disability.
8.The mean maximum difference of HDD between Beijing station and Miyun station in 1971—2004 is-73.8 degree-day in December.
9.The ability to do this effectively is a critical skill in business,and it can mean the difference between success and failure;
10.A mere half second of time lost to task switching can mean the difference between life and death for a driver using a cell phone, Meyer said.

