(a) If X is binomially distributed with 8 trials and a probability of success equal to...

(a) If X is binomially distributed with 8 trials and a probability of success equal to 1/3 at each attempt, what is the probability of:

1. Exactly 4 success

2. At least 1 success

3. At most 3 successes

(b) Find the variance and standard deviation of X where: X = 2 times the score shown on a dice.

Expert Solution

a)For the first sum the pmf of binomial distribution is being stated and putting all the values accordingly , the problem is solved. Please see the attached file i have mentioned all the steps.

b)In this case we have taken that the dice is fair. and rest is mentioned thoroughly in the attachment below.

orchestra answered 2 years ago

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