If np 25 and nq25, estimate P(at least 4) with n=13 and p= 0.5 by using the normal distribution as an approximation to the binomial distribution; if np< 5 or nq< 5, then state that the normal approximation is not suitable. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. P(at least 4)= (Round to three decimal places as needed.) O B. The normal distribution cannot be used.

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