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Please I Need Someone To Solve This Sta203 Assignment by Danny4show(m): 12:59am On Jan 15, 2015 |
All my effort to solve this two questions out of the assignments given to us was fruitless..pls I need your help sir's and ma's.. 1) IN AN EXAMINATION THE AVERAGE GRADE WAS 74 AND THE STANDARD DEVIATION WAS 7. IF 12% OF THE CLASS ARE ALL GIVEN A'S AND THE GRADES ARE CURVED TO FOLLOW A NORMAL DISTRIBUTIONS. WHAT IS THE LOWEST POSSIBLE A'S AND THE HIGHEST POSSIBLE B'S? 2) A LOT CONTAIN 5 ITEMS OF WHICH 4 ARE EFFECTIVE, 3 ITEMS ARE DRAWN AT RANDOM FROM THE LOT ONE AFTER THE ONE WITHOUT REPLACEMENT, FIND THE PROBABILITY THAT ALL THE 3 ARE NOT EFFECTIVE? GOD BLESS YOU AS YOU HELP A BROTHER.... |
Re: Please I Need Someone To Solve This Sta203 Assignment by economia: 2:22am On Jan 15, 2015 |
Can u reach me on 08033147591 |
Re: Please I Need Someone To Solve This Sta203 Assignment by agentofchange1(m): 7:07am On Jan 15, 2015 |
Danny4show: *****Solution ***** Q2 given 4 effective , it means. 1 not effective now total ways of selection = 5C3 p(not effective) = 1- p(effective) => 1 -[ 4C3/5C3 ] = 1-( 4/10) hence probability that all three selected are not effective I.e p(not effective) = 6/10 =0.6 that's it . hope it helps .. |
Re: Please I Need Someone To Solve This Sta203 Assignment by Danny4show(m): 7:23am On Jan 15, 2015 |
agentofchange1:yea thanks bro..what of the second question? |
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