Table 3. Comparison of the inpatient hospital expenditure growth rate of older and younger age groups using t test .

Variable	Observations	Mean	St. error	St. deviation	95% Conf. Interval
30-59 growth rate	36	.023875	.0107203	.0643217	.0021117	.0456383
60-90 growth rate	36	.024386	.0110283	.0661697	.0019975	.0467747
Combined	72	.024130	.0076358	.0647916	.0089053	.0393558
Difference	-	-.0005111	.0153801	-	-.0311858	.0301635

Diff= mean (under 60) – mean (above 60)

Ho: diff = 0

t = - 0.0332

Ha: diff > 0

P value = 0.9736