HP 33s Scientific manual Variable used temporarily to pass the value S ⋅ 2 π to, Inverse program

6.To calculate Q(X) given X, XD.

7.After the prompt, key in the value of X and press g. The result, Q(X), is displayed.

8.To calculate Q(X) for a new X with the same mean and standard deviation, press gand go to step 7.

9.To calculate X given Q(X), press XI.

10.After the prompt, key in the value of Q(X) and press g. The result, X, is displayed.

11.To calculate X for a new Q(X) with the same mean and standard deviation, press gand go to step 10.

Variables Used:

DDummy variable of integration.

MPopulation mean, default value zero.

QProbability corresponding to the upper–tail area.

SPopulation standard deviation, default value of 1.

T	Variable used temporarily to pass the value S ⋅ 2π to the
	inverse program.

XInput value that defines the left side of the upper–tail area.

Example 1:

Your good friend informs you that your blind date has "3σ" intelligence. You interpret this to mean that this person is more intelligent than the local population except for people more than three standard deviations above the mean.

Suppose that you intuit that the local population contains 10,000 possible blind dates. How many people fall into the "3σ" band? Since this problem is stated in terms of standard deviations, use the default value of zero for M and 1 for S.

Keys:	Display:	Description:
(In RPN mode)

XS@ )

g@

)

g)

Starts the initialization routine.

Accepts the default value of zero for M.

Accepts the default value of 1 for S.

Statistics Programs 16–15