A Appendix: A Normal Table

z	% between -z and z
0.00	0.00%
0.05	3.99%
0.10	7.97%
0.15	11.92%
0.20	15.85%
0.25	19.74%
0.30	23.58%
0.35	27.37%
0.40	31.08%
0.45	34.73%
0.50	38.29%
0.55	41.77%
0.60	45.15%
0.65	48.43%
0.70	51.61%
0.75	54.67%
0.80	57.63%
0.85	60.47%
0.90	63.19%
0.95	65.79%
1.00	68.27%
1.05	70.63%
1.10	72.87%
1.15	74.99%
1.20	76.99%
1.25	78.87%
1.30	80.64%
1.35	82.30%
1.40	83.85%
1.45	85.29%
1.50	86.64%
1.55	87.89%
1.60	89.04%
1.65	90.11%
1.70	91.09%
1.75	91.99%
1.80	92.81%
1.85	93.57%
1.90	94.26%
1.95	94.88%
2.00	95.45%
2.05	95.96%
2.10	96.43%
2.15	96.84%
2.20	97.22%
2.25	97.56%
2.30	97.86%
2.35	98.12%
2.40	98.36%
2.45	98.57%
2.50	98.76%
2.55	98.92%
2.60	99.07%
2.65	99.20%
2.70	99.31%
2.75	99.40%
2.80	99.49%
2.85	99.56%
2.90	99.63%
2.95	99.68%
3.00	99.73%
3.05	99.77%
3.10	99.81%
3.15	99.84%
3.20	99.86%
3.25	99.88%
3.30	99.90%
3.35	99.92%
3.40	99.93%
3.45	99.94%
3.50	99.95%
3.55	99.96%
3.60	99.97%
3.65	99.97%
3.70	99.98%
3.75	99.98%
3.80	99.99%
3.85	99.99%
3.90	99.99%
3.95	99.99%
4.00	99.99%
4.05	99.99%
4.10	100.00%
4.15	100.00%
4.20	100.00%
4.25	100.00%
4.30	100.00%
4.35	100.00%
4.40	100.00%
4.45	100.00%