The stochastic variable (Z) is the number of (T) from 20 trials in a Bernoulli process with

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The stochastic variable \(Z\) is the number of \(T\) from 20 trials in a Bernoulli process with parameter \(p=0.8\). Find the distribution function \(h\) of \(Z\), and calculate its expected value and standard deviation. What is \(P(Z \in\{0,1,2,3,4,5\})\) ?

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