Formulae for the standard deviation. Whilst it is not necessary to learn the formula for calculating the standard deviation, there may be times when you wish to include it in a report or dissertation. The standard deviation of an entire population is known as Ï (sigma) and is calculated using:
After 8-20 hours, the egg hatches and the fly enters the maggot stage. It begins to feed on whatever the egg was laid on, usually decomposing flesh. The maggot gorges itself with food until it is ready to enter the pupal stage, at which point the maggot travels away from the food source to a moist spot.
Flies also lay eggs inside the wounds of animals -- both wild and domestic -- dead creatures and manure. Maggots to Pupae After three to five days of feeding, maggots squirm up to 50 feet away from the hatching site to a dry area and begin to pupate.