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Inference aplet 9-13

Results The results are:

One–Sample T–Test

Menu name T–Test: 1 µ

The One–sample T–Test is used when the population standard

deviation is not known. On the basis of statistics from a single

sample, this test measures the strength of the evidence for a

selected hypothesis against the null hypothesis. The null

hypothesis is that the sample mean has some assumed value,

:µ = µ

You select one of the following alternative hypotheses against

which to test the null hypothesis:)

Inputs The inputs are:

Result Description

Test P1–P2 Difference between the

proportions of successes in the

two samples.

Test Z Z–Test statistic.

Prob Probability associated with the

Z–Test statistic.

Critical Z Boundary values of Z associated

with the α level that you supplied.

:µµ

≠

Field name Definition

Sample mean.

Sx Sample standard deviation.

n Sample size.

µ0 Hypothetical population mean.

α Significance level.

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