Tables of Areas under the Normal Curve TABLE V Z .00 .01 .02 .04 Standard Normal Distribution .03 .05 .06 .07 .08 .09 Area -3.0 0.0013 0.0013 -3.4 0.0003 0.0003 0.0003 -3.3 0.0005 0.0005 0.0005 -3.2 0.0007 0.0007 0.0006 -3.1 0.0010 0.0009 0.0009 0.0013 -2.4 0.0082 0.0080 -23 0.0107 0.0104 -2.2 0.0139 0.0136 -2.1 0.0179 0.0174 -2.0 0.0228 0.0222 -1.9 0.0287 0.0281 0.0274 0.0268 0.0262 -1.8 0.0359 0.0351 0.0344 0.0336 0.0329 -1.7 0.0446 0.0436 0.0427 0.0418 0.0409 -1.6 0.0548 0.0537 0.0526 0.0516 0.0505 -1.5 0.0668 0.0655 0.0643 0.0630 0.0618 -1.4 0.0808 0.0793 0.0778 0.0764 0.0749 -1.3 0.0968 0.0951 0.0934 0.0918 0.0901 0.0885 0.0869 0.0078 0.0075 0.0102 0.0099 0.0132 0.0129 0.0170 0.0166 0.0217 0.0212 0.0003 0.0003 0.0003 0.0003 0.0003 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0003 0.0006 0.0006 0.0006 0.0006 0.0005 0.0009 0.0008 0.0008 0.0008 0.0008 0.0012 0.0012 0.0011 0.0011 0.0011 -2.9 0.0019 0.0018 0.0018 0.0017 0.0016 0.0016 0.0015 0.0015 0.0014 0.0014 -2.8 0.0026 0.0025 0.0024 0.0023 0.0023 0.0022 0.0021 0.0021 0.0020 0.0019 -2.7 0.0035 0.0034 0.0033 0.0032 0.0031 0.0030 0.0029 0.0028 0.0027 0.0026 -2.6 0.0047 0.0045 0.0044 0.0043 0.0041 0.0040 0.0039 0.0038 0.0037 0.0036 -2.5 0.0062 0.0060 0.0059 0.0057 0.0055 0.0054 0.0052 0.0051 0.0049 0.0048 0.0073 0.0071 0.0069 0.0068 0.0066 0.0064 0.0096 0.0094 0.0091 0.0089 0.0087 0.0084 0.0125 0.0122 0.0119 0.0116 0.0113 0.0110 0.0162 0.0158 0.0154 0.0150 0.0146 0.0143 0.0207 0.0202 0.0197 0.0192 0.0188 0.0183 0.0256 0.0250 0.0322 0.0314 0.0307 0.0301 0.0294 0.0401 0.0392 0.0384 0.0375 0.0367 0.0495 0.0485 0.0475 0.0465 0.0455 0.0606 0.0594 0.0582 0.0571 0.0559 0.0003 0.0002 0.0005 0.0005 0.0007 0.0007 0.0010 0.0010 0.0244 0.0239 0.0233 0.0735 0.0721 -1.2 0.0708 0.0694 0.0681 0.0853 0.0838 0.0823 0.1020 0.1003 0.0985 0.1210 0.1190 0.1170 0.1423 0.1401 0.1379 0.1660 0.1635 0.1611 0.1922 0.1894 0.1867 0.2206 0.2177 0.2148 0.2514 0.2483 0.2451 0.2810 0.2776 0.1151 0.1131 0.1112 0.1093 0.1075 0.1056 0.1038 -1.1 0.1357 0.1335 0.1314 0.1292 0.1271 0.1251 0.1230 -1.0 0.1587 0.1562 0.1539 0.1515 0.1492 0.1469 0.1446 -0.9 0.1841 0.1814 0.1788 0.1762 0.1736 0.1711 0.1685 -0.8 0.2119 0.2090 0.2061 0.2033 0.2005 0.1977 0.1949 -0.7 0.2420 0.2389 0.2358 0.2327 0.2296 0.2266 0.2236 -0.6 0.2743 0.2709 0.2676 0.2643 0.2611 0.2578 0.2546 -0.5 0.3085 0.3050 0.3015 0.2981 0.2946 0.2912 0.2877 0.2843 -0.4 0.3446 0.3409 0.3372 0.3336 0.3300 0.3264 0.3228 0.3192 0.3156 0.3121 -0.3 0.3821 0.3783 0.3745 0.3707 0.3669 0.3632 0.3594 0.3557 0.3520 0.3483 -0.2 0.4207 0.4168 0.4129 0.4090 0.4052 0.4013 0.3974 0.3936 0.3897 0.3859 -0.1 0.4602 0.4562 0.4522 0.4483 0.4443 0.4404 0.4364 0.4325 0.4286 0.4247 -0.0 0.5000 0.4960 0.4920 0.4880 0.4840 0.4801 0.4761 0.4721 0.4681 0.4641 0.5000 0.5040 0.5080 0.5120 0.5160 0.5199 0.5239 0.5279 0.5319 0.5359 0.5398 0.5438 0.5478 0.5517 0.5557 0.5596 0.5636 0.5675 0.5714 0.5753 0.5793 0.5832 0.5871 0.5910 0.5948 0.5987 0.6026 0.6064 0.6103 0.6141 0.3 0.6179 0.6217 0.6255 0.6293 0.6331 0.6368 0.6406 0.6443 0.6480 0.6517 0.4 0.6554 0.6591 0.6628 0.6664 0.6700 0.6736 0.6772 0.6808 0.6844 0.6879 0.5 0.6915 0.6950 0.6985 0.7019 0.7054 0.7088 0.7123 0.7157 0.7190 0.7224 0.6 0.7257 0.7291 0.7324 0.7357 0.7389 0.7422 0.7454 0.7486 0.7517 0.7549 0.7 0.7580 0.7611 0.7642 0.7673 0.7704 0.7734 0.7764 0.8 0.7881 0.7910 0.7939 0.7967 0.7995 0.8023 0.8051 0.9 0.8159 0.8186 0.8212 1.0 0.8413 0.8438 0.8461 1.1 0.8643 0.8665 0.8686 1.2 0.8849 0.8869 0.8888 1.3 0.9032 0.9049 0.9066 0.0 0.1 0.2 0.7794 0.7823 0.7852 0.8078 0.8106 0.8133 0.8238 0.8264 0.8289 0.8315 0.8340 0.8365 0.8389 0.8485 0.8508 0.8531 0.8554 0.8577 0.8599 0.8621 0.8708 0.8729 0.8749 0.8770 0.8790 0.8810 0.8830 0.8907 0.8925 0.8944 0.8962 0.8980 0.8997 0.9015 0.9082 0.9099 0.9115 0.9131 0.9147 0.9162 0.9177 1.3 1.4 1.8 1.9 0.9732 2.0 0.9772 0.9778 2.1 2.6 0.9788 0.9821 0.9826 0.9830 0.9834 2.2 0.9861 0.9864 0.9868 0.9871 2.3 0.9893 0.9896 0.9898 0.9901 2.4 0.9918 0.9920 0.9922 0.9925 2.5 0.9938 0.9953 0.9783 0.9940 0.9941 0.9943 0.9955 0.9956 0.9957 2.7 0.9965 0.9966 0.9967 0.9968 0.9969 2.8 0.9974 0.9975 0.9976 0.9977 2.9 0.9981 0.9982 0.9982 0.9983 0.9977 0.9984 3.0 0.9987 0.9987 0.9987 3.1 0.9990 0.9991 0.9991 0.9991 3.2 0.9993 0.9993 0.9994 0.9994 3.3 0.9995 0.9995 0.9995 0.9996 3.4 0.9997 0.9997 0.9997 0.9997 0.9032 0.9049 0.9066 0.9082 0.9099 0.9115 0.9131 0.9147 0.9162 0.9177 0.9192 0.9207 0.9222 0.9236 0.9251 0.9265 0.9279 0.9292 0.9306 0.9319 1.5 0.9332 0.9345 0.9357 0.9370 0.9382 0.9394 0.9406 0.9418 0.9429 1.6 0.9452 0.9463 0.9474 0.9484 0.9495 0.9505 0.9515 0.9525 0.9535 1.7 0.9554 0.9564 0.9573 0.9582 0.9591 0.9599 0.9608 0.9616 0.9625 0.9633 0.9641 0.9649 0.9656 0.9664 0.9671 0.9678 0.9686 0.9693 0.9699 0.9706 0.9713 0.9719 0.9726 0.9738 0.9744 0.9750 0.9793 0.9798 0.9803 0.9838 0.9842 0.9846 0.9875 0.9878 0.9881 0.9904 0.9906 0.9909 0.9927 0.9929 0.9931 0.9945 0.9946 0.9948 0.9949 0.9951 0.9952 0.9959 0.9960 0.9961 0.9962 0.9963 0.9964 0.9970 0.9971 0.9972 0.9973 0.9978 0.9979 0.9979 0.9980 0.9984 0.9985 0.9985 0.9986 0.9988 0.9988 0.9989 0.9989 0.9989 0.9990 0.9990 0.9992 0.9992 0.9992 0.9992 0.9993 0.9993 0.9994 0.9994 0.9994 0.9995 0.9995 0.9995 0.9996 0.9996 0.9996 0.9996 0.9996 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.9998 0.9441 0.9545 0.9756 0.9761 0.9767 0.9808 0.9812 0.9817 0.9850 0.9854 0.9857 0.9884 0.9887 0.9911 0.9913 0.9932 0.9934 0.9936 0.9890 0.9916 0.9974 0.9981 0.9986 Z .00 .01 .02 .03 .04 .05 .06 .07 .08 .09 The lengths of a particular animal's pregnancies are approximately normally distributed, with mean = 264 days and standard deviation = 8 days. (a) What proportion of pregnancies lasts more than 268 days? (b) What proportion of pregnancies lasts between 262 and 270 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 260 days? (d) A "very preterm" baby is one whose gestation period is less than 252 days. Are very preterm babies unusual? Click the icon to view a table of areas under the normal curve. (a) The proportion of pregnancies that last more than 268 days is (Round to four decimal places as needed.)