Research question:Are the biacromial diameters of males and females different in the population?

Data were collected from a representative sample and a two independent means t test was conducted.

2-Sample t: BiacromialDiameter by Sex

Method ₁: mean of BiacromialDiameter when Sex = Male ₂: mean of BiacromialDiameter when Sex = Female Difference:₁-₂

Descriptive Statistics: BiacromialDiameter

Sex	N	Mean	StDev	SE Mean
Female	247	41.24	2.09	0.13
Male	260	36.50	1.78	0.11

Estimation for Difference

Difference	Pooled StDev	95% CI for Difference
4.738	1.9354	(4.400, 5.076)

Test

Null hypothesis	1 - 2 = 0
Alternative hypothesis	1 - 2 0

T-Value	DF	P-Value
27.55	505	< 0.0001

Given this output, at the 0.05 alpha level we should [ Select ] ["reject", "fail to reject"] the null hypothesis.

There [ Select ] ["is evidence", "is not evidence"] that the mean biacromial diameters of males and females are different in the population.