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### Tabled Values of Common Distributions

To find the normal critical values proceed as follows. A critical
value is the value of z such that the probability that a standard
normal random variable is bigger than it is equal to alpha.

We proceed to enter the Alpha values in a new column of JMP:

The second column was calculated using the JMP calculator as
follows:

To find the probability that a standard normal random variable
is less than a given z proceed as follows.

Enter the values of z in a new column:

The second column was calculated using the JMP calculator as
follows:

We can do the same type of calculations for the t, chi-square,
and F distribution by selecting the appropriate entry in the probability
function group.

For example, to find the F critical values for an F distribution
with 5 d.f in the numerator and 10 d.f. in the denominator proceed
as follows:

The second column was calculated using the JMP calculator as
follows:

Compare these results with those in Table A.6 on Page 678 of
your textbook.