The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (a) Determine the 20th percentile for incubation times. (b) Determine the incubation times that make up the middle 95%. Click the icon to view a table of areas under the normal curve. (a) The 20th percentile for incubation times is days. (Round to the nearest whole number as needed.)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Part A & Part B
The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day.
(a) Determine the 20th percentile for incubation times.
(b) Determine the incubation times that make up the middle 95%.
Click the icon to view a table of areas under the normal curve.
(a) The 20th percentile for incubation times is
days.
(Round to the nearest whole number as needed.)
Transcribed Image Text:The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (a) Determine the 20th percentile for incubation times. (b) Determine the incubation times that make up the middle 95%. Click the icon to view a table of areas under the normal curve. (a) The 20th percentile for incubation times is days. (Round to the nearest whole number as needed.)
TABLE V
Standard Normal Distribution
.00 .01
.02
.03
.04
.05
.06
.07
.08
.09
Area
-34
-33
-3.2
-3.1
-3.0
0.0003 0.0003 0.0003
0.0005
0.0007 0.0007 0006
0.0010 0,0009 0.0009
0.0003
0.0003
0.0003
0.0003
0.0003
0.0003 0.0002
0.0004 0.0003
0.0005 0.0005
0.0005 0.0005
0.0004
0.0006 0.0006 0.0006
0.0004
0.0004
0.0004
0.0004
0.0006
0.0005
0.0008
0.0008
0.0008
0.0011
0.0009
0.0008
0.0007 0.0007
0.0013 0,0013
0.0013
0.0012
0.0012
0.0011 0.0011
0.0010 0.0010
0.0017
0.0016 0.0015
0.0022 0.0021
0.0030 0,0029 0.0028
0.0040 0.0039 0.0038
0,0054 0,0052 0.0051
-2.9
0.0019 0.0018
0.0018
0.0016
0.0015
0.0014 0.0014
0.0019
0.0027 0.0026
0.0036
0.0049 0.0048
-28
-2.7
0.0026
0.0025
0.0035 0.0034
0.0024
0.0033
0,0023 0.0023
0.0021
0.0020
0.0032
0.0031
-26
-2.5
0.0047
0.0062
0.0045
0.0060
0.0044
0.0043
0.0057
0.0041
0.0037
0.0059
0.0055
-24
-2.3
-22
0.0082
0.0107
0.0139 0.0136 0.0132
0.0080
0.0078
0.0075
0.0099
0.0129
0.0170 0.0166
0.0212
0.0073
0.0096
0.0125
0.0071
0.0094 0.0091
0.0122
0.0162 0.0158
0.0202
0.0069
0.0068
0.0066 0.0064
0.0089
0.0116
0.0150
0.0197 0.0192
0.0104 0.0102
0.0087
0.0084
0.0119
0.0154
0.0113
0.0110
0.0146 0.0143
0.0188
-2.1
0.0179 0.0174
-20
0.0228
0.0222
0.0217
0.0207
0.0183
-1.9
-1.8
-1.7
0.0287 0,0281
0.0359 0.0351
0.0446
0.0274
0.0344
0.0427
0.0526
0.0655 0.0643
0.0268
0.0336
0.0262
0,0329
0.0409
0.0505
0.0256
0.0322
0.0401
0.0495 0.048S
0.0250
0.0314
0.0244
0.0307
0.0239
0.0301
0.0375
0.0233
0.0294
0.0367
0.0436
0.0418
0.0516
0.0384
0.0475
0.0594 0.0582
0.0392
-16
0.0548 0.0537
0.0465 0.0455
-1.5
0.0668
0.0630
0.0618
0.0606
0.0571
0.0559
-1.4
-1.3
0.0808 0.0793
0.0968
0.0951
0.1131
0.1151
0.0778
0.0934
0.1112
0.0764
0.0918
0.1093
0.0749 0.0735
0.0901
0.0885
0.0721 0.0708
0.0869 0.0853
0.1020
0.0694 0.0681
0.0838
0.0823
0.1003
-1.2
-1.1
0.1075
0.1271
0.1056
0.1251
0.1038
0.1230 0.1210
0.0985
0.1170
0.1357 0.1335
0.1587 0.1562
0.1314
0.1292
0.1190
-10
0.1539
0.1515
0.1492
0.1469 0.1446 0.1423 0.1401 0.1379
0.1841 0.1814
0.2119 0.2090
0.2420 0,2389
0.2743 0.2709
0.1788
0.2061
0.2358
0.1685 0.1660 0.1635 0.1611
0.1894
0.2177
-0.9
-0.8
0.1762
0.1736
0.2033
0.2327
0.2643
0.2005
0.2296
0.2611
0.2946
0.1711
0.1977
0.2266
0.1949 0.1922
0,2236
0.1867
0.2206
-0.7
-0.6
0.2148
0.2483 0.2451
0.2676
0.2578
0.2546 0.2514
-0.5
0.3085 0.3050 0.3015
0.2981
0.2912 0.2877 0.2843
0.2810 0.2776
0.3372
0.3745
04129
04522
0.4920
0.5080
0.3336
0.3707
0.4090
0,4483
0.4880
0.5120
0.3300
0.3264
0.3228 0.3192
0.3594
0.3557
0.3974
0.3936
0.4364
0.4325
0.4761
0.4721
0.5239
0.5279
0.3156 03121
0.3520 0.3483
0.3897
-04
0.3446
0.3409
-0,3
-0.2
-0.1
0.3821
0.4207
0.4602
0.5000
0.5000
0.3783
0.4168
0.4562
0.4960
0.5040
0.3669
0.3632
0.4052
0.4013
0.4443 0.4404
0.3859
0,4286 0.4247
-0.0
0.0
0.4641
0.5359
0.4840
0.5160
0.5557
0.5948
0.6331
06700
0.4801
0.5199
0.4681
05319
0.5398 0.5438 0.5478
0.5832
0.6179 0.6217
0,6591
0.517
0.5910
0.6293
0.6664
0.1
0.5596
0.5987
0.6368
0.6736
0.5636
0.6026
0.5675
05714
0.6103
0.5753
0.6141
0.6480 0.6517
0.6844 0.6879
0.5793
0.5871
0.6255
0,6628
0,2
0.6064
0.3
0.4
0.6406
0.6443
0.6808
0,6554
0.6772
0.5
0.6
0.6915 0.6950 0.6985
0.7019 0.7054
0.7088 0.7123
0.7157
0.7486 0.7517
0.7794
0.8078
0.8340
0.7190 0.7224
0.7291
0.7324
0.7642
0.7939
0.8212
0.7357
0.7673
0.7967
0.8238
0.7422
0,7734
0.7995 0.8023
0.8289
0.7454
0,7764
0.7257
0,7389
0.7549
0.7
0.7580 0.7611
0.7704
0.7823 0.7852
0.8
0.9
0.7881
0.8159
0.7910
0.8186
0.8051
0.8315
0.8106
0.8365
0.8133
0.8389
0.8264
0.8413 0.8438
0.8643
0.8849
0.8508
0.8729
0.8925
0.9099
0.9251
0.8577
0.8790
0.8962 0.8980
0.9131
0.9279
10
0.8531
0.8461
0.8686
0,8554
0.8749 0,8770
0.8944
0.8599
0.8485
0.8708
0.8907
0.8621
0.8810 0.8830
0.8997 0.9015
1.1
0.8665
0.8869
1.2
1.3
14
0.8888
0.9032 0.9049 0.9082
0.9222
0.9162
0.9177
0.9306 0.9319
0.9066
0.9115
0.9147
0.9192 0.9207
0.9236
0.9265
0.9292
0.9332 0.9345
1.5
16
0.9382
0.9495
0.9357
0.9474
0.9573
0.9656
0.9713 0.9719 0.9726
0.9370
0.9484
0.9394
0.9505
0.9406
0.9515
0.9418 0.9429 0.9441
0.9535
0.9452
0.9463
0.9525
0.9616
0.9545
0.9625 0.9633
0.9699 0.9706
0.9767
1.7
1.8
0.9554 0.9564
0.9641 0.9649
0.9582 0.9591
0.9671
0,9738
0.9599
0.9608
0.9678 0.9686
0.9744 0.9750
0.9693
0.9756 0.9761
0.9664
1.9
0.9732
0.9772
0,9821
0.9861
0.9778 0.9783
0.9826
0.9830
0.9864
0.9788
0.9834
0.9871
0.9793
0.9838
0.9875
0.9798
0.9842
0.9878
0.9803
0.9846
0.9881
0.9808
0.9850
0.9884
0,9911
0.9932
20
2.1
0.9812 0.9817
0.9854
0.9887
0.9857
0.9890
2.2
23
24
0.9868
0.9898
0.9922
0.9893
0.9896
0.9901
0.9904
0.9906
0.9909
0.9913 0.9916
0.9918 0.9920
0.9925
0.9927
0.9929
0.9931
0.9934
0.9936
0.9941
0.9956
0.9967
0.9946
0.9959 0.9960
0.9969
0.9977 0.9978
0.9983 0.9984 0.9984
0.9951
0.9952
0.9963 0.9964
2.5
0.9938
0.9940
0.9953 0.9955
0.9943
0.9945
0.9948
0.9949
0.9957
26
2.7
0.9961
0.9970 0.9971
0.9962
0.9972
0,9965
0.9974 0.9975
0.9981 0.9982
0.9966
0.9968
0.9973 0.9974
2.8
0.9976
0.9977
0.9979
0.9979
0.9980 0.9981
29
0.9982
0.9985
0.9985
0.9986 0.9986
0.9987 0.9987
0.9990 0.9991
0.9993 0.9993
3.0
0.9987
0.9988
0.9988
0.9989
0.9989
0.9989
0.9990
0.9990
3.1
3.2
0.9991
0.9994
0.9992
0.9995
0.9991
0.9994
0.9996
0.9997
0.9992 0.9992
0.9994 0.9994
0.9992
0.9994
0.9996
0.9997
0.9993
0.9993
0.9995 0.9995
33
34
0.9995 0.9995
0.9997
0.9995
0.9997 0.9997
0.9996
0.9996
0.9997 0.9997
0.9996
0.9997
0.9996 0.9997
0.9997 0.9998
.00
.01
.02
.03
.04
.05
.06
.07
.08
.09
Transcribed Image Text:TABLE V Standard Normal Distribution .00 .01 .02 .03 .04 .05 .06 .07 .08 .09 Area -34 -33 -3.2 -3.1 -3.0 0.0003 0.0003 0.0003 0.0005 0.0007 0.0007 0006 0.0010 0,0009 0.0009 0.0003 0.0003 0.0003 0.0003 0.0003 0.0003 0.0002 0.0004 0.0003 0.0005 0.0005 0.0005 0.0005 0.0004 0.0006 0.0006 0.0006 0.0004 0.0004 0.0004 0.0004 0.0006 0.0005 0.0008 0.0008 0.0008 0.0011 0.0009 0.0008 0.0007 0.0007 0.0013 0,0013 0.0013 0.0012 0.0012 0.0011 0.0011 0.0010 0.0010 0.0017 0.0016 0.0015 0.0022 0.0021 0.0030 0,0029 0.0028 0.0040 0.0039 0.0038 0,0054 0,0052 0.0051 -2.9 0.0019 0.0018 0.0018 0.0016 0.0015 0.0014 0.0014 0.0019 0.0027 0.0026 0.0036 0.0049 0.0048 -28 -2.7 0.0026 0.0025 0.0035 0.0034 0.0024 0.0033 0,0023 0.0023 0.0021 0.0020 0.0032 0.0031 -26 -2.5 0.0047 0.0062 0.0045 0.0060 0.0044 0.0043 0.0057 0.0041 0.0037 0.0059 0.0055 -24 -2.3 -22 0.0082 0.0107 0.0139 0.0136 0.0132 0.0080 0.0078 0.0075 0.0099 0.0129 0.0170 0.0166 0.0212 0.0073 0.0096 0.0125 0.0071 0.0094 0.0091 0.0122 0.0162 0.0158 0.0202 0.0069 0.0068 0.0066 0.0064 0.0089 0.0116 0.0150 0.0197 0.0192 0.0104 0.0102 0.0087 0.0084 0.0119 0.0154 0.0113 0.0110 0.0146 0.0143 0.0188 -2.1 0.0179 0.0174 -20 0.0228 0.0222 0.0217 0.0207 0.0183 -1.9 -1.8 -1.7 0.0287 0,0281 0.0359 0.0351 0.0446 0.0274 0.0344 0.0427 0.0526 0.0655 0.0643 0.0268 0.0336 0.0262 0,0329 0.0409 0.0505 0.0256 0.0322 0.0401 0.0495 0.048S 0.0250 0.0314 0.0244 0.0307 0.0239 0.0301 0.0375 0.0233 0.0294 0.0367 0.0436 0.0418 0.0516 0.0384 0.0475 0.0594 0.0582 0.0392 -16 0.0548 0.0537 0.0465 0.0455 -1.5 0.0668 0.0630 0.0618 0.0606 0.0571 0.0559 -1.4 -1.3 0.0808 0.0793 0.0968 0.0951 0.1131 0.1151 0.0778 0.0934 0.1112 0.0764 0.0918 0.1093 0.0749 0.0735 0.0901 0.0885 0.0721 0.0708 0.0869 0.0853 0.1020 0.0694 0.0681 0.0838 0.0823 0.1003 -1.2 -1.1 0.1075 0.1271 0.1056 0.1251 0.1038 0.1230 0.1210 0.0985 0.1170 0.1357 0.1335 0.1587 0.1562 0.1314 0.1292 0.1190 -10 0.1539 0.1515 0.1492 0.1469 0.1446 0.1423 0.1401 0.1379 0.1841 0.1814 0.2119 0.2090 0.2420 0,2389 0.2743 0.2709 0.1788 0.2061 0.2358 0.1685 0.1660 0.1635 0.1611 0.1894 0.2177 -0.9 -0.8 0.1762 0.1736 0.2033 0.2327 0.2643 0.2005 0.2296 0.2611 0.2946 0.1711 0.1977 0.2266 0.1949 0.1922 0,2236 0.1867 0.2206 -0.7 -0.6 0.2148 0.2483 0.2451 0.2676 0.2578 0.2546 0.2514 -0.5 0.3085 0.3050 0.3015 0.2981 0.2912 0.2877 0.2843 0.2810 0.2776 0.3372 0.3745 04129 04522 0.4920 0.5080 0.3336 0.3707 0.4090 0,4483 0.4880 0.5120 0.3300 0.3264 0.3228 0.3192 0.3594 0.3557 0.3974 0.3936 0.4364 0.4325 0.4761 0.4721 0.5239 0.5279 0.3156 03121 0.3520 0.3483 0.3897 -04 0.3446 0.3409 -0,3 -0.2 -0.1 0.3821 0.4207 0.4602 0.5000 0.5000 0.3783 0.4168 0.4562 0.4960 0.5040 0.3669 0.3632 0.4052 0.4013 0.4443 0.4404 0.3859 0,4286 0.4247 -0.0 0.0 0.4641 0.5359 0.4840 0.5160 0.5557 0.5948 0.6331 06700 0.4801 0.5199 0.4681 05319 0.5398 0.5438 0.5478 0.5832 0.6179 0.6217 0,6591 0.517 0.5910 0.6293 0.6664 0.1 0.5596 0.5987 0.6368 0.6736 0.5636 0.6026 0.5675 05714 0.6103 0.5753 0.6141 0.6480 0.6517 0.6844 0.6879 0.5793 0.5871 0.6255 0,6628 0,2 0.6064 0.3 0.4 0.6406 0.6443 0.6808 0,6554 0.6772 0.5 0.6 0.6915 0.6950 0.6985 0.7019 0.7054 0.7088 0.7123 0.7157 0.7486 0.7517 0.7794 0.8078 0.8340 0.7190 0.7224 0.7291 0.7324 0.7642 0.7939 0.8212 0.7357 0.7673 0.7967 0.8238 0.7422 0,7734 0.7995 0.8023 0.8289 0.7454 0,7764 0.7257 0,7389 0.7549 0.7 0.7580 0.7611 0.7704 0.7823 0.7852 0.8 0.9 0.7881 0.8159 0.7910 0.8186 0.8051 0.8315 0.8106 0.8365 0.8133 0.8389 0.8264 0.8413 0.8438 0.8643 0.8849 0.8508 0.8729 0.8925 0.9099 0.9251 0.8577 0.8790 0.8962 0.8980 0.9131 0.9279 10 0.8531 0.8461 0.8686 0,8554 0.8749 0,8770 0.8944 0.8599 0.8485 0.8708 0.8907 0.8621 0.8810 0.8830 0.8997 0.9015 1.1 0.8665 0.8869 1.2 1.3 14 0.8888 0.9032 0.9049 0.9082 0.9222 0.9162 0.9177 0.9306 0.9319 0.9066 0.9115 0.9147 0.9192 0.9207 0.9236 0.9265 0.9292 0.9332 0.9345 1.5 16 0.9382 0.9495 0.9357 0.9474 0.9573 0.9656 0.9713 0.9719 0.9726 0.9370 0.9484 0.9394 0.9505 0.9406 0.9515 0.9418 0.9429 0.9441 0.9535 0.9452 0.9463 0.9525 0.9616 0.9545 0.9625 0.9633 0.9699 0.9706 0.9767 1.7 1.8 0.9554 0.9564 0.9641 0.9649 0.9582 0.9591 0.9671 0,9738 0.9599 0.9608 0.9678 0.9686 0.9744 0.9750 0.9693 0.9756 0.9761 0.9664 1.9 0.9732 0.9772 0,9821 0.9861 0.9778 0.9783 0.9826 0.9830 0.9864 0.9788 0.9834 0.9871 0.9793 0.9838 0.9875 0.9798 0.9842 0.9878 0.9803 0.9846 0.9881 0.9808 0.9850 0.9884 0,9911 0.9932 20 2.1 0.9812 0.9817 0.9854 0.9887 0.9857 0.9890 2.2 23 24 0.9868 0.9898 0.9922 0.9893 0.9896 0.9901 0.9904 0.9906 0.9909 0.9913 0.9916 0.9918 0.9920 0.9925 0.9927 0.9929 0.9931 0.9934 0.9936 0.9941 0.9956 0.9967 0.9946 0.9959 0.9960 0.9969 0.9977 0.9978 0.9983 0.9984 0.9984 0.9951 0.9952 0.9963 0.9964 2.5 0.9938 0.9940 0.9953 0.9955 0.9943 0.9945 0.9948 0.9949 0.9957 26 2.7 0.9961 0.9970 0.9971 0.9962 0.9972 0,9965 0.9974 0.9975 0.9981 0.9982 0.9966 0.9968 0.9973 0.9974 2.8 0.9976 0.9977 0.9979 0.9979 0.9980 0.9981 29 0.9982 0.9985 0.9985 0.9986 0.9986 0.9987 0.9987 0.9990 0.9991 0.9993 0.9993 3.0 0.9987 0.9988 0.9988 0.9989 0.9989 0.9989 0.9990 0.9990 3.1 3.2 0.9991 0.9994 0.9992 0.9995 0.9991 0.9994 0.9996 0.9997 0.9992 0.9992 0.9994 0.9994 0.9992 0.9994 0.9996 0.9997 0.9993 0.9993 0.9995 0.9995 33 34 0.9995 0.9995 0.9997 0.9995 0.9997 0.9997 0.9996 0.9996 0.9997 0.9997 0.9996 0.9997 0.9996 0.9997 0.9997 0.9998 .00 .01 .02 .03 .04 .05 .06 .07 .08 .09
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