Hp 49g Graphing Calculator Manual do Utilizador descarregar pdf (Página 182)

Menu name: T-Test: |il - ¡i2

The Two-sample T-test is used when the population standard deviation is

not known. On the basis of statistics from two samples, each sample from

a different population, measures the strength of the evidence for a

selected hypothesis against the null hypothesis. The null hypothesis is that

the mean of population 1 equals the mean of population 2: if q- P-i = hi

You select one of the following alternative hypotheses against which to

test the null hypothesis

< h2

> h2

Two-Sample T-Test

Inputs

X 1 Sample 1 mean.

Sample 2 mean.

SI Sample 1 standard deviation.

Sample 2 standard deviation.

111 Sample 1 size.

ii2 Sample 2 size.

a Significance level.

.Pooled? Check this option to pool samples based on their

standard deviations.

Results

TestT

T-test statistic.

Prob Probability associated with the T-test statistic.

Critical T Bomidary value of T associated with the a level that;

supplied.

Page 9-14 Using statistics

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Hp 49g Graphing Calculator Manual do Utilizador Página 182