1.   Attendance rates are calculated by dividing the number of openings in the school register by the number of pupils present.

2.   Finally, morbidity rates can be calculated on the basis of data provided by national surveys of self-reported illness.

3.   This is done by calculating a rate of discount.

4.   Rates are calculated on an hourly basis.

5.   This experiment intends to calculate the rate at which reaction time increase with amount of choice.

6.   Recurrence rates were calculated by lifetable analysis and compared by the log rank test.

7.   To examine further the association of age and anti-HEV, prevalence rates were calculated for each decade.

8.   Analysts warned that the apparent tumble in July was probably a result of a flaw in the formula used to calculate seasonal rates.

9.   Because none of the wireless companies would disclose how many subscribers they have in California, The Chronicle could not calculate complaint rates to compare one carrier to another.

10.   Both growth rates were calculated on a weighted basis.