The table below shows the lengths of 40 babies at birth. To calculate the cumulative frequencies, add the frequencies together. A cumulative frequency diagram is drawn by plotting the upper class ...

Here is the data for the ages of customers shopping in the Bitesize CD store. Ages of customers in 1-hour period 25, 29, 45, 19, 36, 17, 60, 51, 39, 24, 15, 13, 31 ...

Figure 4. A snapshot, in time, of two complex numbers whose exponents, and thus their phase angles, change with time. The notion of negative frequency is often troubling to engineers who've spent so ...