## Poisson Cumulative Distribution Tables

The table below gives the probability of that a Poisson random variable X with mean = λ is less than or equal to x.

 λ = 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.2 1.4 1.6 1.8 x= 0 0.9048 0.8187 0.7408 0.6703 0.6065 0.5488 0.4966 0.4493 0.4066 0.3679 0.3012 0.2466 0.2019 0.1653 1 0.9953 0.9825 0.9631 0.9384 0.9098 0.8781 0.8442 0.8088 0.7725 0.7358 0.6626 0.5918 0.5249 0.4628 2 0.9998 0.9989 0.9964 0.9921 0.9856 0.9769 0.9659 0.9526 0.9371 0.9197 0.8795 0.8335 0.7834 0.7306 3 1 0.9999 0.9997 0.9992 0.9982 0.9966 0.9942 0.9909 0.9865 0.981 0.9662 0.9463 0.9212 0.8913 4 1 1 1 0.9999 0.9998 0.9996 0.9992 0.9986 0.9977 0.9963 0.9923 0.9857 0.9763 0.9636 5 1 1 1 1 1 1 0.9999 0.9998 0.9997 0.9994 0.9985 0.9968 0.994 0.9896 6 1 1 1 1 1 1 1 1 1 0.9999 0.9997 0.9994 0.9987 0.9974 7 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9997 0.9994 8 1 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 9 1 1 1 1 1 1 1 1 1 1 1 1 1 1 λ = 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.5 5 5.5 x = 0 0.1353 0.1108 0.0907 0.0743 0.0608 0.0498 0.0408 0.0334 0.0273 0.0224 0.0183 0.0111 0.0067 0.0041 1 0.406 0.3546 0.3084 0.2674 0.2311 0.1991 0.1712 0.1468 0.1257 0.1074 0.0916 0.0611 0.0404 0.0266 2 0.6767 0.6227 0.5697 0.5184 0.4695 0.4232 0.3799 0.3397 0.3027 0.2689 0.2381 0.1736 0.1247 0.0884 3 0.8571 0.8194 0.7787 0.736 0.6919 0.6472 0.6025 0.5584 0.5152 0.4735 0.4335 0.3423 0.265 0.2017 4 0.9473 0.9275 0.9041 0.8774 0.8477 0.8153 0.7806 0.7442 0.7064 0.6678 0.6288 0.5321 0.4405 0.3575 5 0.9834 0.9751 0.9643 0.951 0.9349 0.9161 0.8946 0.8705 0.8441 0.8156 0.7851 0.7029 0.616 0.5289 6 0.9955 0.9925 0.9884 0.9828 0.9756 0.9665 0.9554 0.9421 0.9267 0.9091 0.8893 0.8311 0.7622 0.686 7 0.9989 0.998 0.9967 0.9947 0.9919 0.9881 0.9832 0.9769 0.9692 0.9599 0.9489 0.9134 0.8666 0.8095 8 0.9998 0.9995 0.9991 0.9985 0.9976 0.9962 0.9943 0.9917 0.9883 0.984 0.9786 0.9597 0.9319 0.8944 9 1 0.9999 0.9998 0.9996 0.9993 0.9989 0.9982 0.9973 0.996 0.9942 0.9919 0.9829 0.9682 0.9462 10 1 1 1 0.9999 0.9998 0.9997 0.9995 0.9992 0.9987 0.9981 0.9972 0.9933 0.9863 0.9747 11 1 1 1 1 1 0.9999 0.9999 0.9998 0.9996 0.9994 0.9991 0.9976 0.9945 0.989 12 1 1 1 1 1 1 1 0.9999 0.9999 0.9998 0.9997 0.9992 0.998 0.9955 13 1 1 1 1 1 1 1 1 1 1 0.9999 0.9997 0.9993 0.9983 14 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9998 0.9994 15 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9998 16 1 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 17 1 1 1 1 1 1 1 1 1 1 1 1 1 1 λ = 6 6.5 7 7.5 8 8.5 9 9.5 10 11 10 12 14 15 x = 0 0.0025 0.0015 0.0009 0.0006 0.0003 0.0002 0.0001 0.0001 0 0 0 0 0 0 1 0.0174 0.0113 0.0073 0.0047 0.003 0.0019 0.0012 0.0008 0.0005 0.0002 0.0005 0.0001 0 0 2 0.062 0.043 0.0296 0.0203 0.0138 0.0093 0.0062 0.0042 0.0028 0.0012 0.0028 0.0005 0.0001 0 3 0.1512 0.1118 0.0818 0.0591 0.0424 0.0301 0.0212 0.0149 0.0103 0.0049 0.0103 0.0023 0.0005 0.0002 4 0.2851 0.2237 0.173 0.1321 0.0996 0.0744 0.055 0.0403 0.0293 0.0151 0.0293 0.0076 0.0018 0.0009 5 0.4457 0.369 0.3007 0.2414 0.1912 0.1496 0.1157 0.0885 0.0671 0.0375 0.0671 0.0203 0.0055 0.0028 6 0.6063 0.5265 0.4497 0.3782 0.3134 0.2562 0.2068 0.1649 0.1301 0.0786 0.1301 0.0458 0.0142 0.0076 7 0.744 0.6728 0.5987 0.5246 0.453 0.3856 0.3239 0.2687 0.2202 0.1432 0.2202 0.0895 0.0316 0.018 8 0.8472 0.7916 0.7291 0.662 0.5925 0.5231 0.4557 0.3918 0.3328 0.232 0.3328 0.155 0.0621 0.0374 9 0.9161 0.8774 0.8305 0.7764 0.7166 0.653 0.5874 0.5218 0.4579 0.3405 0.4579 0.2424 0.1094 0.0699 10 0.9574 0.9332 0.9015 0.8622 0.8159 0.7634 0.706 0.6453 0.583 0.4599 0.583 0.3472 0.1757 0.1185 11 0.9799 0.9661 0.9467 0.9208 0.8881 0.8487 0.803 0.752 0.6968 0.5793 0.6968 0.4616 0.26 0.1848 12 0.9912 0.984 0.973 0.9573 0.9362 0.9091 0.8758 0.8364 0.7916 0.6887 0.7916 0.576 0.3585 0.2676 13 0.9964 0.9929 0.9872 0.9784 0.9658 0.9486 0.9261 0.8981 0.8645 0.7813 0.8645 0.6815 0.4644 0.3632 14 0.9986 0.997 0.9943 0.9897 0.9827 0.9726 0.9585 0.94 0.9165 0.854 0.9165 0.772 0.5704 0.4657 15 0.9995 0.9988 0.9976 0.9954 0.9918 0.9862 0.978 0.9665 0.9513 0.9074 0.9513 0.8444 0.6694 0.5681 16 0.9998 0.9996 0.999 0.998 0.9963 0.9934 0.9889 0.9823 0.973 0.9441 0.973 0.8987 0.7559 0.6641 17 0.9999 0.9998 0.9996 0.9992 0.9984 0.997 0.9947 0.9911 0.9857 0.9678 0.9857 0.937 0.8272 0.7489 18 1 0.9999 0.9999 0.9997 0.9993 0.9987 0.9976 0.9957 0.9928 0.9823 0.9928 0.9626 0.8826 0.8195 19 1 1 1 0.9999 0.9997 0.9995 0.9989 0.998 0.9965 0.9907 0.9965 0.9787 0.9235 0.8752 20 1 1 1 1 0.9999 0.9998 0.9996 0.9991 0.9984 0.9953 0.9984 0.9884 0.9521 0.917 21 1 1 1 1 1 0.9999 0.9998 0.9996 0.9993 0.9977 0.9993 0.9939 0.9712 0.9469 22 1 1 1 1 1 1 0.9999 0.9999 0.9997 0.999 0.9997 0.997 0.9833 0.9673 23 1 1 1 1 1 1 1 0.9999 0.9999 0.9995 0.9999 0.9985 0.9907 0.9805 24 1 1 1 1 1 1 1 1 1 0.9998 1 0.9993 0.995 0.9888 25 1 1 1 1 1 1 1 1 1 0.9999 1 0.9997 0.9974 0.9938 26 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9987 0.9967 27 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9994 0.9983 28 1 1 1 1 1 1 1 1 1 1 1 1 0.9997 0.9991 29 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9996 30 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 0.9998 31 1 1 1 1 1 1 1 1 1 1 1 1 1 0.9999 32 1 1 1 1 1 1 1 1 1 1 1 1 1 1