Hp Prime Graphing Wireless Calculator Manuel d'utilisateur Page 91

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Inference app 87
One-Sample T-Interval
Menu name T-Int: 1 μ
This option uses the Student’s t-distribution to calculate a
confidence interval for μ, the true mean of a population,
for the case in which the true population standard
deviation, σ, is unknown.
Inputs The inputs are:
Results The results are:
Two-Sample T-Interval
Menu name T-Int: μ
1
μ
2
This option uses the Student’s t-distribution to calculate a
confidence interval for the difference between the means
of two populations, μ
1
μ
2
, when the population
standard deviations, σ
1
and σ
2
, are unknown.
Field
name
Definition
Sample mean
s Sample standard deviation
n Sample size
C Confidence level
x
Result Description
CConfidence level
DF Degrees of freedom
Critical T Critical values for T
Lower Lower bound for μ
Upper Upper bound for μ
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