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.
The snake races along with its head held high and about one-third of its body off the ground. That can be up to four feet (1.2 meters) off the ground - about chin level for some people. The black mamba is the most respected and feared snake in Africa. World's Fastest Snake | The Black Mamba. Without treatment, the death rate from a black mamba bite is almost 100 percent. Although two drops of venom from a black mamba are enough to kill a human (they are one of the most poisonous smakes in the world), mambas don't usually attack humans.