10000 0 13.5049 Multiplies by the
population. Displays
the approximate
num
ber
of
blind
dates
in
the local population,
which
meet
the
criteria.
Since your friend has been known to exaggerate from time to time,
you decide to see how rare a
"2a"
date might be. Note that the pro
gram may be rerun simply by pressing IR/s
I.
Keys:
Display:
Description:
IR/SI
X?3.0000
Resumes program.
2|R/S|
Q=0.0227
Enters
X-value
of
2
and
calculates
Q(X).
10000 0
227.4937
Multiplies by
the
population for the re
vised
estimate.
Example
2.
The
mean
of a
set
of test scores is 55.
The
standard
devi
ation is 15.3. Assuming that the standard normal curve adequately
models
the
distribution,
what
is the probability
that
a randomly se
lected student scored 90? What is the score that only 10 percent of the
students would be expected to
have
surpassed?
What
would be
the
score that only 20 percent of the students would have failed to
achieve?
220
13:
Statistics
Programs
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