Question
Completed pregnancies are normally distributed with a mean of 266 days and a standard deviation of 16 days. Use table b7 to determine probablity of that a completed pregnacy lasts at least
I) 270 days
Ii) 310 days

Table B-7 The Normal Distribution z 00 01 02 03 04 05D6 07 08 09 0.0 5000 4960 4920 4880 4840 4801 4761 4721 4681 4841 0.1 4802 4562 4522 4483 4443 4404 4364 4325 4286 4247 0.2 4207 4168 4129 4090 4052 4013 3974 3936 3897 3859 0.3 3821 3873 3745 3707 3669 3632 3594 3557 3520 3483 04 3446 3409 3372 3336 3300 3264 3228 3192 .3156 .3121 0.5 3085 3050 3015 2981 2946 2912 2877 2843 .2810 2776 0.6 2743 2709 2676 2643 2611 2578 2546 2514 2483 2451 0.7 2420 2389 2358 2327 2296 2266 2236 2206 2217 2148 0.8 2119 2090 2061 2033 2005 1977 1949 1922 1894 1867 0.9 1841 .1814 1788 .1762 1736 .1711 1685 1660 .1635 .1611 1.0 .1587 .1562 .1539 .1515 .1492 1469 .1446 .1423 .1401 .1379 1.1 1357 .1335 1314 1292 1271 1251 .1230 .1210 .1190 .1170 12 1151 1131 1112 .1093 1075 1056 1038 1020 .1003 .0985 1.3 .0968 0951 0934 .0918 0901 0885 .0869 .0853 .0838 0823 1.4 .0808 .0793 ,0778 .0764 .0749 .0735 0721 .0708 .0694 .0681 1.5 0668 0655 0643 .0630 .0618 0606 .0594 0582 .0571 .0559 1.6 0548 .0537 0526 0516 0505 0495 .0485 .0475 0465 0455 1.7 0446 0436 0427 0418 0409 .0401 0392 .0384 .0375 0367 1.8 0359 .0351 0344 0366 .0329 0322 0314 .0307 0301 0294 1.9 .0287 .0281 0274 0268 .0262 .0256 0250 0244 .0239 .0233 2.0 0228 0222 0217 0212 .0207 0202 0197 .0192 .0188 0183 2.1 0179 0174 .0170 0166 0162 .0158 0154 0150 0148 0143 2.2 0139 0136 0132 0129 .0125 0122 0119 .0116 .0113 .0110 2.3 0107 .0104 0102 0099 .0096 .0094 .0091 0089 0087 0084 2.40082 .0080 .0078 .0075 0073 0071 0069 .0068 0066 .0064 2.5 0062 .0060 .0059 .0057 .0055 .0054 .0052 0051 .0049 .0048 26 0047 0045 .0044 0043 .0041 .0040 0039 0038 0037 0036 2.7 0035 .0034 0033 0032 0031 0030 0029 0028 0027 0026 2.8 0026 0025 0024 0023 0023 .0022 .0021 0020 .0020 0019 2.9 0019 0018 0018 0017 0016 0016 0015 0015 .0014 0014 3.0 0013 0013 0013 0012 0012 .0011 0011 0011 0011 .0010 Soutcer Based on Bometnka Tables for Statisticians Vol 1, 3rd ed, 1966, wih the permijssion ol the Diometnika trustees Note The lb ploes the cumulative probability Zz FVo
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