In a binomial distribution, n = 12 and π = 0.6.

 

(a) Find the probability for x = 5?

 

asked Jun 23, 2013 in Statistics Answers by anonymous

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1 Answer

Mean np = 12*0.6 = 7.2 variance npq = 12*0.6*0.4 = 2.88 Standard Deviation = 2.88^(1/2) = Approx. 1.7 prob x = 5 (we first work out the z-value) z [(5-7.2)/1.7 z= 1.29412 probability under that z-value comes to 0.4015 Therefore P (X=5) = 0.4015
answered Jul 29, 2013 by J Kula
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