Water				Glass
Image depth ί (cm)	object depth δ (cm)	index of refraction		Image depth ί (cm)	object depth δ (cm)	index of refraction
5.5	9	1.64		0.3	0.5	1.67
7	9	1.29		0.3	0.5	1.67
7.5	9	1.2		0.3	0.5	1.67
8.4	9	1.07		0.4	1	2.5
9	9	1		0.5	0.6	1.2
10	14.5	1.45		0.5	1	2
11.7	14.2	1.21		0.5	1	2
11.7	14.2	1.21		0.5	1	2
12	14.5	1.21		0.5	1.5	3
14	14.5	1.04		0.6	1.2	2
22	31	1.41		0.6	2	3.33
29	43.5	1.5		0.8	1.5	1.88
29.5	42.5	1.44		0.8	2.7	3.38
31	42.5	1.37		0.9	1.9	2.11
32.2	42.6	1.32		1	1.4	1.4
34	44	1.29		1	1.4	1.4
36.9	50.5	1.37		1	1.5	1.5
37	51.4	1.39		1	3.2	3.2
38.5	52	1.35		1.1	2	1.82
41.8	50.2	1.2		1.4	1.9	1.36
	sample size n	20
	sample mean	1.3
	sample st dev sx	0.16
	c	0.95
	tcritical	2.09
	standard error se	0.04
	margin of error E	0.07
p(	1.22	≤ μ ≤	1.37	)=0.95
			Known population mean μ refractive index water:	1.33
			Known population mean μ refractive index glass:	1.52