©Richard Lowry, 2000-

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Appendix to Chapter 6:

z to P Calculator

For any given value ofz, this page will calculateTo proceed, simply enter the value of

- the respective one-
tailed probabilities of —zand+z;

- the two-
tailed probability of ±z;

- and the proportion of the normal distribution falling between
—zand+z.

zin the designated cell and click "Calculate." Note that the programming for this page is able to perform meaningful probability calculations only for cases where |z|<5.

z =

ProbabilitiesP

Text will appear in this box only if

the value of |z| is greater than 3.75.one-tailed for —zone-tailed for +ztwo-tailed for ±zarea between ±z

Go to Chapter 7 [Tests of Statistical Significance: Three Overarching Concepts]

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