To ascertain the effectiveness of their advertising campaigns, firms frequently conduct telephone interviews with consumers using random-digit dialing. With this method, a random number generator mechanically creates the sample of phone numbers to be called.

a. Explain how the random number table (Table 1 of Appendix B) or a computer could be used to generate a sample of 7-digit telephone numbers.

b. Use the procedure you described in part a to generate a sample of ten 7-digit telephone numbers.

c. Use the procedure you described in part a to generate five 7-digit telephone numbers whose first three digits are 373.

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TABLE 1 Random Numbers Column ROW 1 2 3 4 567 8 9 10 11 12 13 HSG 2288823858 14 15 16 17 18 19 20 21 24 26 27 1 2 3 10480 15011 01536 22368 46573 25595 24130 48360 42167 93093 37570 39975 77921 06907 99562 72905 96301 91977 89579 85475 28918 63553 09429 10365 07119 51085 02368 01011 52162 07056 48663 54164 4 5 6 8 9 10 11 7 69179 02011 81647 91646 14194 62590 36207 20969 85393 30995 89198 27982 53402 93965 34095 52666 22527 97265 76393 64809 15179 24830 49340 30680 32081 57004 00849 06243 61680 07856 16376 39440 53537 71341 81837 16656 06121 91782 60468 81305 49684 60672 14110 06927 11008 42751 27756 53498 18602 21916 81825 15053 48840 56420 69994 98872 31016 70659 90655 44013 69014 60045 71194 18738 63213 21069 05463 84903 14342 63661 05585 10281 17453 36857 53342 53988 53060 69578 88231 33276 70997 18593 91610 07972 18876 20922 94595 56869 18425 18103 57740 84378 25331 12566 58678 44947 59533 38867 62300 08158 17983 16439 11458 79936 56865 05859 90106 31595 01547 85590 69445 18663 72695 52180 20847 12234 90511 33703 33488 36320 17617 30015 08272 67689 93394 47564 40961 48235 03427 49626 88974 93969 52636 92737 30613 84115 27156 85104 61129 87529 85689 48237 52267 01511 26358 20285 29975 97336 71048 08178 81056 97735 85977 29372 74461 92144 49442 53900 70960 63990 77233 13916 12765 51821 51259 77452 16308 60756 21382 52404 60268 89368 19885 55322 44819 54092 33362 94904 31273 04146 18594 53916 46369 58586 23216 14513 83149 01188 65255 64835 29852 51132 98736 94738 33787 13602 09998 42698 06691 76988 90229 85828 14346 09172 30168 04734 22421 74103 47070 25306 76468 26384 24200 13363 38005 94342 28728 87308 58731 00256 45834 15398 07351 19731 92420 60952 61280 50001 66566 14778 76797 96423 24878 82651 26432 46901 20849 89768 66432 84673 40027 32832 32639 29334 02488 81525 29676 00742 97628 91245 58492 32363 27001 33062 72295 20591 57392 05597 87637 28834 04839 68086 39064 LO 71585 85030 23495 64350 51851 46104 59193 22178 58151 06646 21524 12 13 99570 91291 19174 39615 63348 88916 30421 19655 74917 97758 01263 44394 10634 42508 28551 90707 75601 40719 05944 55157 92747 64951 35156 35749 19509 25625 58104 61666 99904 32812 15227 96909 44592 35806 06912 17012 64161 18296 22851 46557 41135 10367 07684 36188 18510 86679 50720 32586 13300 87074 79666 67658 14780 81536 86645 12659 92259 57102 80428 61362 98947 96067 64760 64584 96096 14 90700 99505 58629 16379 54613 42880 12952 32307 56941 64952 78188 90322 74952 89868 44919 01915 17752 94953 95725 25280 98253