One–Sample T–Interval

Menu name

T–INT: 1

 

 

This option uses the Student’s t–distribution to calculate a

 

confidence interval for , the true mean of a population, for

 

the case in which the true population standard deviation, σ, is

 

unknown.

 

Inputs

The inputs are:

 

 

 

 

 

 

 

Field name

Definition

 

 

 

 

 

 

 

 

 

Sample mean.

 

x

 

Sx

Sample standard deviation.

 

n

Sample size.

 

C

Confidence level.

Results

 

 

 

 

The results are:

 

 

 

 

 

Result

Description

 

 

 

 

Critical T

Critical value for T.

 

Min

Lower bound for .

 

Max

Upper bound for .

 

 

 

 

 

9-20

Inference aplet

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Image 134
HP 40G manual One-Sample T-Interval, Sample mean