Wide Variation of Squeezing Force and Dispensing Time Interval among Eyedropper Bottles

Table 4

Comparison of drop interval and shape of eyedropper bottles.

	Shape	Shape (number)	Mean	SD	Lower 95% CI	Upper 95% CI
First drop	Round	Round (59)	2.9	1.3	2.6	3.3
	Dimple	Dimple (10)	3.8	0.7	2.4	3.2
	Square	Square (9)	4	1.2	3.2	4.8
Second drop	Round	Round (59)	1.8	0.6	1.6	1.9^¶,¶¶
	Dimple	Dimple (10)	3.1	0.6	2.7	3.4^¶,¶¶
	Square	Square (9)	2.3	1.2	1.5	3^¶¶

CI: confidential interval; ; ; ^¶; ^¶¶; Tukey–Kramer HSD test.