Example 9: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. If we stipulate that a baby is. premature if the length of pregnancy is in the lowest 4%, find the length that. separates premature babies form those who are not premature.) Table A-2 is designed only for the standard normal distribution, which has a mean of 0 and a standard deviation of 1. II) Each value in the body of the table is the cumulative area from the left op to a vertical line above a specific value of z.
The black mamba (Dendroaspis polylepis) is a venomous snake endemic to sub-Saharan Africa. It takes its common name not from the colour of its scales, but from the interior of its mouth, which is inky-black.
1 The black mamba is Africaâs largest venomous snake. 2  Interestingly, the black mamba is a brown to grey colour, and is instead named for its blue-black mouth lining. 3  One of the fastest snakes in the world, the black mamba is an agile species that actively hunts warm-blooded prey.enus. Dendroaspis. The black mamba (Dendroaspis polylepis) is Africaâs largest venomous snake and also one of its most feared. This species is also one of the fastest snakes in the world and can slither at speeds of up to about 20 kilometres per hour.