document.write( "Question 1143456: the time required to finish a test in normally distributed with a mean of 40 minutes and a standard deviation of 8 minutes. what is the probability that a student chosen at random will finish the test between 24 and 48 minutes
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Algebra.Com's Answer #764271 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! z=(x-mean)/sd \n" ); document.write( "z is between (24-40)/2 and (48-40)/2 or between -2 and 1. \n" ); document.write( "That probability is 0.8186 \n" ); document.write( " |