Learn about calculating the mean, mode and range from a frequency table with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

To calculate an estimate for the mean from a grouped frequency table: Set up a new column to write the midpoint of each class. Set up another column to multiply each midpoint by its frequency.

Delay lines are used in applications that require a signal delay of a few nanoseconds (ns) or where incremental timing corrections are needed for the system to work properly. This article discusses ...