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16-16 Statistics Programs
4. After the prompt for S, key in the population standard deviation and press
. (If the standard deviation is 1, just press .)
5. To calculate X given Q(X), skip to step 9 of these instructions.
6. To calculate Q(X) given X,
D.
7. After the prompt, key in the value of X and press
. The result, Q(X), is
displayed.
8. To calculate Q(X) for a new X with the same mean and standard deviation,
press
and go to step 7.
9. To calculate X given Q(X), press
I.
10. After the prompt, key in the value of Q(X) and press . The result, X, is
displayed.
11. To calculate X for a new Q(X) with the same mean and standard deviation,
press
and go to step 10.
Variables Used:
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.
D Dummy variable of integration.
M Population mean, default value zero.
Q Probability corresponding to the upper–tail area.
S Population standard deviation, default value of 1.
T
Variable used temporarily to pass the value S × to the inverse
program.
X Input value that defines the left side of the upper–tail area.
Keys:
(In RPN mode)
Display: Description:
S
Starts the initialization routine.
π
2