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1.A doctor knows from experience that the average time that a patient takes to complete a psychological test is 21 minutes, and standard deviation

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1.A doctor knows from experience that the average time that a patient takes to complete a psychological test is 21 minutes, and standard deviation of 2 minutes. The shape of the population distribution is normal. Please answer the following questions and make a graph for each part. a. Use the 68-95-99.7 Empirical rule to find the mid 99.7% quiz completion test ranges. Use z scores: b. Find the 85th percentile score for the psychological test. C. What percent of students obtained a score less than 20 minutes? Area- Table IV Standard Normal Distribution Z .00 .01 .02 .03 -3.4 -2.8 0.0023 -2.7 0.0031 -2.6 .004 .06 .08 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0002 -3.3 0.0005 0.0005 0.0005 0.0004 0.0004 0.0004 0.0004 0.0004 0.0004 0.0003 -3.2 0.0007 0.0007 0.0006 0.0006 0.0006 0.0006 0.0006 0.0005 0.0005 0.0005 -3.1 0.0010 0.0009 0.0009 0.0009 0.0008 0.0008 0.0008 0.0008 0.0007 0.0007 -3.0 0.0013 0.0013 0.0013 0.0012 0.0012 0.0011 0.0011 0.0011 0.0010 0.0010 -2.9 0.0019 0.0018 0.0018 0.0017 0.0016 0.0015 0.0014 0.0014 0.0026 0.0025 0.0024 0.0023 0.0035 0.0034 0.0033 0.0032 0.0047 0.0045 0.0044 0.0043 .05 .07 .09 0.0016 0.0015 0.0022 0.0021 0.0021 0.0020 0.0019 0.0030 0.0029 0.0028 0.0027 0.0026 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 -2.4 0.0082 0.0080 0.0078 0.0075 0.0073 0.0068 -2.3 0.0107 -2.2 -2.0 0.0228 0.0222 0.0104 0.0102 0.0139 0.0136 0.0132 0.0129 -2.1 0.0179 0.0174 0.0170 0.0166 0.0217 0.0099 0.0096 0.0125 0.0162 0.0158 0.0212 0.0207 0.0202 0.0154 0.0197 0.0071 0.0069 0.0094 0.0091 0.0089 0.0087 0.0084 0.0122 0.0119 0.0116 0.0113 0.0110 0.0150 0.0146 0.0143 0.0192 0.0066 0.0064 0.0188 0.0183 -1.9 0.0287 0.0281 0.0274 0.0268 0.0262 0.0336 -0.9 0.1736 -0.8 0.2005 0.0256 0.0250 -1.8 0.0359 0.0351 0.0344 0.0314 -1.7 0.0446 0.0436 0.0427 0.0418 0.0409 0.0401 0.0392 -1.6 0.0548 0.0537 0.0526 0.0516 0.0505 0.0495 0.0485 -15 0.0668 0.0655 0.0643 0.0630 0.0618 0.0606 -14 0.0808 0.0793 0.0778 0.0764 0.0749 0.0735 0.0721 0.0708 0.0694 0.0681 -13 0.0968 0.0951 0.0934 0.0918 0.0901 0.0885 0.0869 0.0853 0.0838 0.0823 -1.2 0.1151 0.1131 0.1112 0.1093 0.1075 0.1056 0.1038 0.1020 0.1003 0.0985 -1.1 0.1357 0.1335 0.1314 0.1292 0.1271 0.1251 0.1230 0.1210 0.1190 0.1170 -1.0 0.1587 0.1562 0.1539 0.1515 0.1492 0.1469 0.1446 0.1423 0.1841 0.1814 0.1788 0.1762 0.2119 0.2090 0.2061 0.2033 0.0244 0.0239 0.0233 0.0329 0.0322 0.0307 0.0301 0.0294 0.0384 0.0375 0.0367 0.0475 0.0465 0.0455 0.0594 0.0582 0.0571 0.0559 0.1401 0.1379 0.1711 0.1685 0.1660 0.1635 0.1611 0.1977 0.1949 0.1922 0.1894 0.1867 -0.7 0.2296 -0.6 0.2420 0.2389 0.2358 0.2327 0.2266 0.2236 0.2206 0.2177 0.2148 0.2743 0.2709 0.2676 0.2643 0.2611 0.2578 0.2546 0.2514 0.2483 0.2451 -0.5 0.3085 03050 03015 0.2981 0.2946 0.2912 0.2877 0.2843 0.2810 0.2776 -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 03783 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 -0.0 0.5000 0.4960 0.4920 0.4880 0.4840 0.4801 0.4761 0.4721 0.4681 0.4247 0.4641

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