For a Variable Z That Has a Standard Normal Distribution

question 35

Essay

For a variable z that has a standard normal distribution,
a)What is the probability that z < −2.45?
b)What is the probability that z < +1.67?
c)What is the probability that z is between −1.43 and +1.43?
d)What value of z separates the smaller 10% of the standard normal distribution from the larger 90%?
e)What values of −z and +z separate the middle 95% of the standard normal distribution from the extreme 5%?

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Definitions:

Polygenic

A term describing traits or conditions caused by multiple genes, often resulting in a wide range of potential outcomes or phenotypes.

Nonadditive

Relating to or characterized by a process or effect that does not simply combine individual components in a straightforward, additive manner.

Human Genome Project

An international scientific research project aimed at mapping and understanding all the genes of the human species, completed in 2003.

Genetic Codes

Sequences of nucleotides in DNA or RNA that determine the genetic instructions used in the development and functioning of all known living organisms.