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.
Maggot farmer. The process starts with temperature- and humidity- controlled rooms filled with millions of flies. These flies lay their eggs on to meat and fish that we provide for them. The eggs are transferred to our production factory for hatching and are then placed into concrete pits, where they are fed fish, chicken and turkey. It takes five to seven days to produce a fully grown maggot.