document.write( "Question 1177176: Labor negotiators estimate that 30 percent of all major contract negotiations result in a strike. During the next year, 12 major contracts must be negotiated. Determine the following probabilities using the binomial table.
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Algebra.Com's Answer #805452 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi\r\n" );
document.write( "Binomial Distribution: p(strike) = .30   n = 12\r\n" );
document.write( "Using TI or similarly an inexpensive calculator like a Casio fx-115 ES plus \r\n" );
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document.write( "a. no major strikes  = binompdf(n, p, x-value). = binompdf(12, .30,0) = .0138\r\n" );
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document.write( "b. P(at least 5) = P(x≥5) =  1 - P(x≤ 4) = 1-binomcdf(12, .30, 4) =1 - .7237 = .2763\r\n" );
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document.write( "c. between 2 and 4 inclusive (that is 2, 3, or 4). = P(2) + P(3) = P(4) - \r\n" );
document.write( "P(2) + P(3) + P(4) = .1678 + .2397 + .2311\r\n" );
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document.write( "d. Determine the mean and variance of the number of strikes next year.\r\n" );
document.write( "  Mean = np = 12*.30 = 3.6\r\n" );
document.write( " Variance = np(1-p) = 3.6(.70) = 2.52\r\n" );
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document.write( "Wish You the Best in your Studies.\r\n" );
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