HP Prime Graphing NW280AAABA manual One-Sample T-Interval, Two-Sample T-Interval

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:

Field Definition name

xSample mean

sSample standard deviation

nSample size

CConfidence level

Results	The results are:
	Result	Description
	C	Confidence level
	DF	Degrees of freedom
	Critical T	Critical values for T
	Lower	Lower bound for μ
	Upper	Upper bound for μ

Two-Sample T-Interval

Menu name	T-Int: μ1 – μ2
	This option uses the Student’s t-distribution to calculate a
	confidence interval for the difference between the means
	of two populations, μ1 – μ2, when the population
	standard deviations, σ1and σ2, are unknown.

256 Inference app