The marks obtained by the students in an examination are known to be normally distributed with a mean of 56, and a standard deviation of 10. Calculate the proportion of students that score below 45? 0.03 0.06 0.07 0.01 50000 49601 0.02 0.04 0.05 0.08 0.09 -0 49202 48803 48405 48006 47608 47210 46812 46414 -0.1 46017 45620 45224 44828 44433 44034 43640 43251 42858 42465 -0.2 42074 41683 41294 40905 40517 40129 39743 39358 38974 38591 -0.3 38209 37828 37448 37070 36693 36317 35942 35569 35197 34827 -0.4 34458 34090 33724 33360 32997 32636 32276 31918 31561 31207 -0.5 30854 30503 30153 29806 29460 29116 28774 28434 28096 27760 -0.6 27425 27093 26763 26435 26109 25785 25463 25143 24825 24510 -0.7 24196 23885 23576 23270 22965 22663 22363 22065 21770 21476 -0.8 21186 20897 20611 20327 20045 .19766 .19489 .19215 .18943 .18673 -0.9 .18406 .18141 .17879 .17619 17361 .17106 .16853 .16602 .16354 .16109 -1 .15866 .15625 .15386 .15151 .14917 .14686 .14457 14231 .14007 .13786 -1.1 .13567 13350 .13136 12924 12714 .12507 12302 .12100 .11900 .11702 -1.2 .11507 11314 1123 .10935 .10749 .10565 .10383 .10204 .10027 09853 -1.3 09680 .09510 .09342 .09176 .09012 .08851 .08692 08534 08379 08226 -1.4 08076 .07927 .07780 .07636 07493 07353 .07215 07078 06944 06811 -1.5 06681 06552 .06426 .06301 06178 „06057 .05938 .05821 05705 05592 -1.6 05480 05370 .05262 .05155 05050 .04947 .04846 04746 04648 .04551 -1.7 04457 .04363 .04272 .04182 „04093 .04006 .03920 .03836 .03754 .03673 -1.8 03593 03515 .03438 03362 03288 03216 03144 03074 03005 02938 -1.9 02872 02807 .02743 .02680 02619 02559 .02500 02442 02385 02330 -2 02275 02222 02169 02118 02068 02018 01970 01923 01876 01831 0.86433 O 0.13350 O 0.5 ) 0.13567

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