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Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 250 mg and a standard deviation of 49
Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 250 mg and a standard deviation of 49 mg. Determine the percent of adults who consume less than 250 mg of caffeine daily. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table % of adults consume less than 250 mg of caffeine daily. (Round to two decimal places as needed.)Standard normal distribution table, page 1 Table of Areas to the Left of : When : Is Negative -01 -03 -04 .05 -06 .07 -3.4 0003 0003 0003 .0003 .0003 0003 .0003 0003 .0003 .0002 -3.3 .0005 -DO05 .0004 .0004 -0004 .0004 .0004 .0004 .0003 -3.2 .0007 .0007 .0006 .DO06 .0006 -0006 .0006 .0005 .0005 .0005 -3.1 0010 -0009 -0019 .0009 .0008 .0O08 .0008 .0007 .0007 -3.0 0013 -0013 -0013 -0012 .0012 -001 1 ,001 1 ,001 1 .0010 .0010 -2.9 0019 .0018 .0018 .0017 -0016 -0016 .0015 .0015 .0014 .0014 -2.8 .0026 -0025 -0024 .0023 .0023 -0022 .0021 .0021 .0020 .0019 -2.7 0035 .0034 .0033 .0032 .0031 -0030 .0029 .0028 .0027 .0026 -2.6 0047 .0045 .0044 .0043 .0041 -0040 .0039 .0038 .0037 10036 -2.5 0062 -0060 -0059 .0057 .0055 -0054 .0052 .005 1 .00-49 .0048 -2.4 .0082 -0080 .0078 .0075 .0073 -0071 .0069 .0068 .0066 .0064 -23 0107 .0104 -0102 .0099 .0096 -0094 .0091 .0089 .0087 .0084 -2.2 .0139 .0136 .0132 .0129 .0125 .0122 .0119 .0116 .0113 .0110 -2.1 0179 0174 0170 .0166 .0162 .0158 .0154 0150 .0146 .0143 -2.0 0228 .0222 .0217 .0212 .0207 -0202 .0197 .0192 .0188 .0183 -1.9 0287 .0281 .0274 .0268 -0262 .0256 .0250 .0244 .0239 .0233 -1.8 0359 -0351 -0344 .0336 0329 .0322 .0314 .0307 .0301 .0294 -1.7 0446 -0436 -0427 .0418 .0409 -0401 .0392 .0384 .0375 .0367 -1.6 0548 -0537 -0526 .0516 .0505 -0495 .0485 .0475 .0465 .0455 -1.5 0668 -0655 -0643 .0630 .0618 -0606 .0594 .0582 .0571 0559 -1.4 0808 -0793 -0778 .0764 .0749 -0735 .0721 .0708 .0694 .068 -1.3 0968 -0951 -0934 .0918 .0901 -0885 .0869 .0853 .0838 .0823Standard normal distribution table, page 1 .0062 .0060 .0059 .0057 .0035 0034 10052 JOOST -0049 10048 -2.4 .0082 .0080 .0078 .0075 .0073 .0071 .0069 .0068 .0066 -23 0107 .0104 .0102 .0099 .0096 .0094 .0091 .0089 -0087 .0084 -2.2 .0139 .0136 .0132 0129 .0125 .0122 .0119 .01 16 .0113 .0110 -2.1 0179 .0174 .0170 .0166 .0162 .0158 .0154 .0150 -0146 .0143 -2.0 0228 .0222 .0217 .0212 .0207 .0202 .0197 .0192 .0188 .0183 - 1.9 .0287 .0281 .0274 .0268 .0262 -0256 .0250 .0244 .0239 .0233 -1.8 0359 .0351 .0344 .0336 .0329 -0322 .0314 .0307 .0301 .0294 -1.7 0446 .0436 .0427 .0418 .0409 .0401 .0392 .0384 -0375 .0367 -1.6 0548 .0537 .0526 .0516 .0505 0495 .0485 .0475 -0465 .0455 - 1.5 0668 .0655 .0643 .0630 .0618 0606 .0594 .0582 -0571 .0559 - 1.4 .0808 .0793 .0778 .0764 .0749 .0735 .0721 .0708 -0694 .068 1 -1.3 0968 .0951 .0934 .0918 .0901 0885 .0869 -0853 .0838 .0823 -1.2 -1151 .1131 .1112 .1093 .1075 .1056 .1038 -1020 -1003 .0985 -1.1 .1357 .1335 .1314 .1292 .1271 .1251 .1230 .1210 .1 190 .1 170 -1.0 .1587 .1562 .1539 .1515 .1492 .1469 .1446 .1423 -1401 .1379 -0.9 .1841 .1814 .1788 .1762 .1736 .1711 .1685 .1660 .1635 .1611 -0.8 .2119 .2090 .2061 .2033 .2005 .1977 .1949 .1922 .1894 .1867 -0.7 .2420 .2389 .2358 .2327 .2296 .2266 .2236 .2206 .2177 .2148 -0.6 2743 .2709 .2676 .2643 .2611 .2578 .2546 .2514 .2483 .2451 -0.5 3085 .3050 .3015 .2981 .2947 .2912 .2877 .2843 .2810 .2776 -0.4 3446 .3409 .3372 .3336 .3300 .3264 .3228 -3192 .3156 -3121 -0.3 3821 3783 3745 .3707 .3669 .3632 .3594 .3557 .3520 .3483 - 0.2 -4207 .4168 .4129 .4090 .4052 -4013 3974 .3936 .3897 .3859 -0.I .4602 .4562 .4522 .4483 .4443 .4404 4364 .4325 .4286 .4247 -0.0 5000 .4960 .4920 .4880 .4840 .4801 .4761 .4721 .4681 -4641 For values of : less than - 3,49, use 01000 to approximate the area.Standard normal distribution table, page 2 Table of Areas to the Left of : When : Is Positive .00 .01 .02 .03 .04 .05 .06 .07 09 0.0 .5000 .5040 .5080 .$120 .$160 .$199 5239 5279 5319 5359 0.1 .5398 .5438 5478 .5517 .5557 .5596 .5636 5675 5714 5753 0.2 .5793 .5832 5871 5910 5948 5987 .6026 .6064 .6103 6141 03 .6179 .6217 .6255 .6293 .6331 .6368 .6406 .6443 .6480 6517 0.4 .6554 .6591 .6628 .6664 .6700 .6736 .6772 -6808 6844 -6879 5 6915 .6950 .6985 .7019 .7054 .7088 .7123 .7157 .7190 .7224 0.6 .7257 .7291 .7324 .7357 .7389 .7422 .7454 .7486 .7517 .7549 0.7 .7580 .7611 7642 .7673 .7704 .7734 .7764 .7794 .7823 .7852 .7881 .7910 .7939 .7967 .7995 .8023 .805 1 .8078 8106 .8133 0.9 .8159 .8186 .8212 .8238 .8264 .8289 .8315 8340 8365 8389 1.0 .8413 .8438 .8461 .8485 .8508 .8531 .8554 8577 8599 8621 1.1 .8643 .8665 .8686 .8708 .8729 .8749 .8770 8790 8810 8830 12 .8849 .8869 .8888 .8907 .8925 .8944 .8962 .8980 8997 .9015 1.3 .9032 .9049 .9066 .9082 .9099 .9115 .9131 9147 .9162 .9177 1.4 .9192 .9207 .9222 .9236 .9251 .9265 .9279 -9292 -9306 .9319 15 .9332 .9345 .9357 .9370 .9382 .9394 .9406 $418 -9429 9441 1.6 .9452 .9463 .9474 .9484 .9495 .9505 .9515 -9525 .9535 .9545 1.7 .9554 .9564 .9573 .9582 .9591 .9599 .9608 9616 9625 -9633 1.8 .9641 .9649 .9656 .9664 .9671 .9678 .9686 .9693 -9699 9706 1.9 .9713 .9719 .9726 .9732 .9738 .9744 .9750 -9756 9761 9767 2.0 .9772 .9778 .9783 .9788 .9793 .9798 .9803 -9308 -9812 -9817 2.1 .9821 .9826 .9830 .9834 .9838 .9842 .9846 .9850 .9854 9857 0871Standard normal distribution table, page 2 ) .8413 .8438 .8461 .8485 .8508 -8531 .8554 .8577 .8599 .8621 1.1 .8643 -8665 8686 -8708 .8729 .8749 .8770 .8790 -8810 .8830 1.2 .8849 .8869 .8858 .8907 .8925 -8944 .8962 .8980 -8997 .9015 1.3 .9032 -9049 .9066 .9082 .9099 .9115 .9131 .9147 .9162 .9177 1.4 .9207 .9222 .9236 .9251 -9265 .9279 .9292 .9306 .9319 1.5 .9332 .9345 .9357 -9370 .9382 .9394 .9406 .9418 .9429 .9441 .9452 .9463 .9474 .9484 .9495 -9505 .9515 .9525 .9535 .9545 1.7 9554 .9564 .9573 .9582 .9591 .9599 .9608 .9616 .9625 .9633 1.8 .9641 .9649 .9656 .9664 .9671 .9678 .9686 .9693 9699 .9706 1.9 9713 .9719 .9726 .9732 .9738 .9744 .9750 .9756 .9761 .9767 20 .9772 .9778 .9783 .9788 .9793 .9798 .9803 .9808 .9812 .9817 2.1 9821 9826 .9830 .9834 .9838 .9842 .9846 .9850 .9854 .9857 2.2 .9861 .9864 9868 -9871 .9875 .9878 .9881 .9884 .9487 .9890 2.3 .9893 .9896 .9898 .9901 .9904 .9906 .9909 .9911 .9913 .9916 2.4 .9918 .9920 .9922 .9925 .9927 .9929 .9931 .9932 .9934 .9936 2.5 .9938 .9940 .9941 .9943 .9945 .9946 .9948 .9949 .9951 .9952 2.6 .9953 .9955 .9956 .9957 .9959 .9960 .9961 .9962 .9963 .9964 2.7 9965 .9966 .9967 .9968 .9969 -9970 .9971 .9972 .9973 .9974 .9974 .9975 .9976 .9937 .9977 .9978 .9979 .9979 .9980 .9981 9981 .9982 .9982 .9983 .9984 .9984 .9985 .9985 .9986 .9986 ) .9987 .9987 .9987 .9988 .9988 .9989 .9939 .9989 .9990 .9990 3.1 .9990 .9991 .9991 .9991 .9992 -9992 .9992 .9992 .9993 .9993 3.2 .9993 .9993 .9994 .9994 9994 .9994 .9994 .9995 .9995 .9995 3.3 .9995 .9995 .9995 .9996 .9996 .9996 .9996 .9996 .9996 .9997 3.4 .9997 .9997 .9997 .9997 .9997 .9997 .9997 .9997 .9997 .9998 For : values greater than 3,49, use 1.000 to approximate the area
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