HP 49g Graphing Calculator - Manual (Page 185)

Results
Critical Z
71 Min
A 71 Max
Critical value for Z.
Lower bound for the difference in proportions of
successes.
Upper bound for the difference in proportions of
successes.
One-Sample T-!nterval
Menu name; T-INT: 1 p
This option uses the Student’s t-distribution to calculate a confidence
interval for p, the true mean of a population, for the case in which the true
population standard deviation, a, is imknown.
Inputs
X
Sx
n
C
Results
Sample mean.
Sample standard deviation.
Sample size.
Confidence level.
Critical T Critical value for T.
p Min Lower boimd for p.
p Max Upper bound for p.
Using statistics Page 9-17