document.write( "Question 711485: Fifty percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. Find the probability that the number that they say they would feel secure is (a) exactly five, (b) more than five, (c) at most five \n" ); document.write( "
Algebra.Com's Answer #437442 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Fifty percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. \n" ); document.write( "--- \n" ); document.write( "Binomial Problems with n = 8 and P(secure) = 1/2 \n" ); document.write( "------------------ \n" ); document.write( "Find the probability that the number that they say they would feel secure is (a) P(exactly five) = 8C5(1/2)^8 = 56/256 \n" ); document.write( "------------------------------------------------ \n" ); document.write( "(b) P(more than five) = 1 - binomcdf(8,1/2,4) = 0.3633 \n" ); document.write( "------------------------------------------------ \n" ); document.write( "(c) P(at most five) = binomcdf(8,1/2,5) = 0.8555 \n" ); document.write( "================================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================================ \n" ); document.write( " \n" ); document.write( " |