Table 2.

Estimated regression coefficients.

Term	Parameter estimate	Standard error	t-statistic	p-value
Intercept	77.93	2.449	31.82	<.0001
Shift 1	35.90	3.463	10.37	<.0001
Shift 2	32.26	3.463	9.32	<.0001
Holiday	−64.84	8.254	−7.86	<.0001
Weekday	65.38	2.911	22.46	<.0001
Shift 1 × holiday	41.48	11.673	3.55	0.0004
Shift 2 × holiday	−303.45	11.673	−26.00	<.0001
Shift 1 × weekday	−41.28	4.116	−10.03	<.0001
Shift 2 × weekday	298.82	4.116	72.59	<.0001