Need help with the following

Determine if there is a significant difference between student diagnostic test scores before and after completing a workshop. Explain your answer.

From the data below, I was able to return the following stats:

t-Test: Paired Two Sample for Means
	Pre-Test	Post-Test
Mean	82.66667	91.38667
Variance	135.4414	355.6728
Observations	75	75
Pearson Correlation	0.279937
Hypothesized Mean Difference	0
df	74
t Stat	-3.93538
P(T<=t) one-tail	9.29E-05
t Critical one-tail	1.665707
P(T<=t) two-tail	0.000186
t Critical two-tail	1.992543

Pre-Test	Post-Test
59	62
59	126
60	63
63	130
64	65
64	69
65	67
66	70
66	69
68	131
69	73
69	71
72	133
72	134
73	77
73	75
73	78
73	75
73	77
73	77
73	135
76	81
77	81
77	82
77	92
78	83
78	81
78	141
78	82
79	82
82	84
83	85
83	85
83	83
83	83
83	94
83	98
84	94
84	85
85	90
85	57
85	60
85	89
86	91
86	89
86	61
87	90
87	84
87	89
88	92
88	98
88	83
88	92
88	98
89	92
89	92
89	92
93	101
93	101
93	101
94	101
94	101
94	101
97	104
97	104
97	104
101	82
101	109
101	109
101	105
101	106
101	107
101	108
101	109
101	109